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how many four-digit numbers contain the digit 5 or 7 (or both) theorem
how many four-digit numbers contain the digit 5 or 7 (or both) theorem
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How many times greater is the value of the digit 5 in 583,607 than the value of the digit 5 in 362,501?
How many times greater is the value of the digit 5 in 583,607 than the value of the digit 5 in 362,501?
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How many \(n\)-digit natural numbers are there that do not contain the digits \(0,1,2\), but contain the digits \(3,4,5\) ?
How many \(n\)-digit natural numbers are there that do not contain the digits \(0,1,2\), but contain the digits \(3,4,5\) ?
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Eva, Per, and Anna randomly select different nine-digit integers made of digits \(1,2, \ldots, 9\) and check if they are divisible by 11 . Anna claims that the probability that the number is divisible by 11 is exactly \(1 / 11\);
Eva, Per, and Anna randomly select different nine-digit integers made of digits \(1,2, \ldots, 9\) and check if they are divisible by 11 . Anna claims that the probabilit...
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Sep 22, 2022
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413
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Define the last two digits of the number
Define the last two digits of the number\[2^5+2^{5^2}+2^{5^3}+\cdots+2^{5^{1991}}\]when this number is written in a decimal system.
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410
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Define the last two digits of the number \[ 2^5+2^{5^2}+2^{5^3}+\cdots+2^{5^{1991}} \] when this number is written in a decimal system.
Define the last two digits of the number\[2^5+2^{5^2}+2^{5^3}+\cdots+2^{5^{1991}}\]when this number is written in a decimal system.
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Sep 22, 2022
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136
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Is \(4 \sqrt{4-2 \sqrt{3}}+\sqrt{97-56 \sqrt{3}}\) an integer?
Is \(4 \sqrt{4-2 \sqrt{3}}+\sqrt{97-56 \sqrt{3}}\) an integer?
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Sep 22, 2022
Mathematics
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311
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What are whole numbers?
What are whole numbers?
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113k
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Sep 7, 2022
Mathematics
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797
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A 4 digit number when squared, the last 4 digits of the square are same as that of the original number. Find the sum of digits of this number.
A 4 digit number when squared, the last 4 digits of the square are same as that of the original number. Find the sum of digits of this number.
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Aug 16, 2022
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605
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What 4-digit number keeps the same last 4 digits when it is squared?
What 4-digit number keeps the same last 4 digits when it is squared?
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Aug 7, 2022
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513
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A five digit number is formed by the digits \(1,2,3,4,5\) without repetition. Find the probability that the number formed is divisible by 4 .
A five digit number is formed by the digits \(1,2,3,4,5\) without repetition. Find the probability that the number formed is divisible by 4 .
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534
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If 4-digits numbers greater than 5000 are randomly formed from the digits \(0,1,3,5\) and 7 what is the probability of forming a number divisible by 5 when,
If 4-digits numbers greater than 5000 are randomly formed from the digits \(0,1,3,5\) and 7 what is the probability of forming a number divisible by 5 when,(i) the digits...
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726
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A class consists of 15 boys of whom 5 are prefects. How many committees of 8 can be formed if each consists of
A class consists of 15 boys of whom 5 are prefects. How many committees of 8 can be formed if each consists of (a) exactly 2 prefects?(b) at least 2 prefects?
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Jul 22, 2022
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824
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How many numbers greater than 1000 can be formed with the digits \(3,4,6,8,9\) if a digit cannot occur more than once in a number?
How many numbers greater than 1000 can be formed with the digits \(3,4,6,8,9\) if a digit cannot occur more than once in a number?
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Jul 22, 2022
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264
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Find the number of positive divisors of \(9 ! .\)
Find the number of positive divisors of \(9 ! .\)
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Jul 8, 2022
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950
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How many of the six integers 1 through 6 are divisors of the four-digit number 1452?
How many of the six integers 1 through 6 are divisors of the four-digit number 1452?
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Jul 8, 2022
Mathematics
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397
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What is the nearest integer to \((5+2 \sqrt{7})^{4}\) ?
What is the nearest integer to \((5+2 \sqrt{7})^{4}\) ?
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Jul 8, 2022
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309
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A number is doubled, then decreased by \(13.7\). The result is greater than \(125.28\). What is the smallest integer that satisfies this condition?
A number is doubled, then decreased by \(13.7\). The result is greater than \(125.28\). What is the smallest integer that satisfies this condition?
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Jul 7, 2022
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463
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What is the \(1000^{\text {th }}\) positive integer with an odd number of digits?
What is the \(1000^{\text {th }}\) positive integer with an odd number of digits?
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Jul 7, 2022
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1.2k
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How many times does the digit 6 appear in the list of all integers from 1 to 100?
How many times does the digit 6 appear in the list of all integers from 1 to 100?
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Jul 7, 2022
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594
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The product of two whole numbers is 1000. If neither of the numbers is a multiple of 10, what is their sum?
The product of two whole numbers is 1000. If neither of the numbers is a multiple of 10, what is their sum?
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Jul 7, 2022
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750
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Given the four digits \(2,4,6\), and 7 , how many different positive two-digit integers can be formed using these digits if a digit can be repeated in an integer?
Given the four digits \(2,4,6\), and 7 , how many different positive two-digit integers can be formed using these digits if a digit can be repeated in an integer?
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Jul 7, 2022
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461
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If a number cannot be immediately repeated, how many different three number combinations are possible for a combination lock with numbers \(0,1, \ldots, 29\).
If a number cannot be immediately repeated, how many different three number combinations are possible for a combination lock with numbers \(0,1, \ldots, 29\).
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Jun 17, 2022
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687
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Half of a certain number is 3 more than the number.
Half of a certain number is 3 more than the number.
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68.1k
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AstraNova
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Mar 8, 2022
Mathematics
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912
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Half of a certain number is 3 more than the number.
Half of a certain number is 3 more than the number.
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68.1k
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Mar 8, 2022
Mathematics
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795
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Six increased by three times a number is 42. What is the number?
Six increased by three times a number is 42. What is the number?
AstraNova
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Mar 7, 2022
Mathematics
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433
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Try out this interactive berry quiz
Try out this interactive berry quiz
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113k
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Jan 11, 2022
General Knowledge
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805
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What is the result of this math problem?
What is the result of this math problem?
Siyavula
Wooden Status
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Siyavula
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Sep 17, 2021
Mathematics
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520
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The first three terms of a sequence are $p+1 ; 2 p+2 ; 4 p$. Calculate the value of $\mathrm{p}$ and the first three terms of the sequence.
The first three terms of a sequence are $p+1 ; 2 p+2 ; 4 p$. Calculate the value of $\mathrm{p}$ and the first three terms of the sequence.
Siyavula
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Aug 28, 2021
Mathematics
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916
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A number is increased by 2 and then multiplied by 3. The result is 24. What is this number?
A number is increased by 2 and then multiplied by 3. The result is 24. What is this number?
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Jul 22, 2021
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770
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The number $2^{-100}$ is written as a decimal. What is the sum of the first 30 digits after the decimal point?
The number $2^{-100}$ is written as a decimal. What is the sum of the first 30 digits after the decimal point?
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Jun 26, 2021
Mathematics
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2.2k
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How many three digit numbers are there whose first digit equals the sum of the second and third digits?
How many three digit numbers are there whose first digit equals the sum of the second and third digits?
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Jun 16, 2021
Mathematics
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2.8k
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Three four-digit numbers are written on cards. Cards are in position as is shown in the image. The sum of those three numbers is $10,126 .$ Which digits are covered?
Three four-digit numbers are written on cards. Cards are in position as is shown in the image. The sum of those three numbers is $10,126 .$ Which digits are covered?
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Jun 16, 2021
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1.3k
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How many three-digit numbers have the first digit equal to the sum of the other two digits?
How many three-digit numbers have the first digit equal to the sum of the other two digits?
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113k
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MathsGee
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Jun 16, 2021
Mathematics
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332
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What are whole numbers?
What are whole numbers?
AstraNova
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68.1k
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May 24, 2021
Mathematics
numbers
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rwanda
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2.0k
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How many two digit numbers contain either a 5 or a 6 (or both)?
How many two digit numbers contain either a 5 or a 6 (or both)?
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113k
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May 12, 2021
Mathematics
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763
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Evaluate the sum of the digits of the product $999 \times 777$.
Evaluate the sum of the digits of the product $999 \times 777$.
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May 12, 2021
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803
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Grade 12 - Paper1 - In a certain country, 10 -digit telephone numbers with the following format were introduced:
In a certain country, 10 -digit telephone numbers with the following format were introduced:Digits may be repeated. How many possible 10 -digit telephone numbers could be...
Student
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Student
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May 6, 2021
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The product of two whole numbers is 96 and their sum is less than 30. What are the possibilities for the two numbers?
The product of two whole numbers is 96 and their sum is less than 30. What are the possibilities for the two numbers?
MathsGee
Platinum
113k
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MathsGee
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Apr 21, 2021
Mathematics
math
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809
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how many whole numbers less than 500 have seven as the sum of their digits?
how many whole numbers less than 500 have seven as the sum of their digits?
anonymous
anonymous
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Mar 17, 2021
Mathematics
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533
views
1
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when twice a number is decreased by 8, the result is the number increased by 7. find the number?
when twice a number is decreased by 8, the result is the number increased by 7. find the number?
anonymous
anonymous
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Mar 11, 2021
Mathematics
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answers
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1.4k
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1
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five times the sum of a number and eight is twenty-five. find the number.
five times the sum of a number and eight is twenty-five. find the number.
anonymous
anonymous
asked
Mar 9, 2021
Mathematics
math
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answers
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328
views
0
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square root six over square root 7 multiplied by square root 14 over square root 3.
square root six over square root 7 multiplied by square root 14 over square root 3.
anonymous
anonymous
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Feb 21, 2021
Mathematics
math
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571
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0
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What is the sum when all these products are added?
Each element of the arithmetic sequence 101, 111, 121, . . . , 201 is multiplied to each element of the arithmetic sequence 212, 222, 232, . . . , 302. What is the sum wh...
AstraNova
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68.1k
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AstraNova
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Feb 18, 2021
Mathematics
word-problems
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sum
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calculate
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757
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1
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the sum of two times a number and eight is equal to three times the difference between the number and four. what's the number?
the sum of two times a number and eight is equal to three times the difference between the number and four. what's the number?
anonymous
anonymous
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Feb 18, 2021
Mathematics
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answers
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1.0k
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0
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If four times a number is increased by 15, the result is three less than six times the number. What is the number?
If four times a number is increased by 15, the result is three less than six times the number. What is the number?
MathsGee
Platinum
113k
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MathsGee
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Feb 2, 2021
Mathematics
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number
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713
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what number minus one-half is equal to negative one-half ?
what number minus one-half is equal to negative one-half ?
anonymous
anonymous
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Jan 17, 2021
Mathematics
math
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1.0k
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1
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the sum of 2/3 and four times a number is equal to 5/6 subtracted from five times the number. find the number.
the sum of 2/3 and four times a number is equal to 5/6 subtracted from five times the number. find the number.
anonymous
anonymous
asked
Jan 4, 2021
Mathematics
math
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1.1k
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1
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when the square of an integer is added to ten times the integer, the sum is zero. what is the integer?
when the square of an integer is added to ten times the integer, the sum is zero. what is the integer?
anonymous
anonymous
asked
Dec 27, 2020
Mathematics
question
answer
word-problems
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390
views
1
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how many eight-digit telephone numbers are possible if the first digit must be nonzero?
how many eight-digit telephone numbers are possible if the first digit must be nonzero?
anonymous
anonymous
asked
Dec 1, 2020
Mathematics
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