Recent questions tagged try

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how many four-digit numbers contain the digit 5 or 7 (or both) theorem
780
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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?
578
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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 \(3,4,5\) ?
301
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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 probabilit...
413
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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.
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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.
136
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Is \(4 \sqrt{4-2 \sqrt{3}}+\sqrt{97-56 \sqrt{3}}\) an integer?
311
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What are whole numbers?
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.
605
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What 4-digit number keeps the same last 4 digits when it is squared?
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 .
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,(i) the digits...
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) exactly 2 prefects?(b) at least 2 prefects?
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?
264
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Find the number of positive divisors of \(9 ! .\)
950
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How many of the six integers 1 through 6 are divisors of the four-digit number 1452?
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What is the nearest integer to \((5+2 \sqrt{7})^{4}\) ?
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?
463
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What is the \(1000^{\text {th }}\) positive integer with an odd number of digits?
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How many times does the digit 6 appear in the list of all integers from 1 to 100?
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?
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?
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 \(0,1, \ldots, 29\).
687
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Half of a certain number is 3 more than the number.
912
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Half of a certain number is 3 more than the number.
795
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Six increased by three times a number is 42. What is the number?
433
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Try out this interactive berry quiz
805
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What is the result of this math problem?
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.
916
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A number is increased by 2 and then multiplied by 3. The result is 24. What is this number?
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?
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?
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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?
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How many three-digit numbers have the first digit equal to the sum of the other two digits?
332
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What are whole numbers?
2.0k
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How many two digit numbers contain either a 5 or a 6 (or both)?
763
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Evaluate the sum of the digits of the product $999 \times 777$.
803
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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...
1.1k
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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?
809
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how many whole numbers less than 500 have seven as the sum of their digits?
533
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when twice a number is decreased by 8, the result is the number increased by 7. find the number?
1.4k
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five times the sum of a number and eight is twenty-five. find the number.
328
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square root six over square root 7 multiplied by square root 14 over square root 3.
571
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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...
757
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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?
1.0k
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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?
713
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what number minus one-half is equal to negative one-half ?
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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.
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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?
390
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how many eight-digit telephone numbers are possible if the first digit must be nonzero?
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