MathsGee Answers - Recent questions tagged numbers
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Powered by Question2AnswerFind the sum of first 24 terms of the list of numbers whose $n^{th}$ term is given by $a_n = 3 +2n$
https://mathsgee.com/25159/find-the-sum-first-terms-the-list-numbers-whose-term-given-an
Find the sum of first 24 terms of the list of numbers whose $n^{th}$ term is given by $a_n = 3 +2n$Mathematicshttps://mathsgee.com/25159/find-the-sum-first-terms-the-list-numbers-whose-term-given-anSat, 20 Feb 2021 16:00:47 +0000What is the value of 3784÷17?
https://mathsgee.com/25156/what-is-the-value-of-3784-17
What is the value of 3784÷17?Mathematicshttps://mathsgee.com/25156/what-is-the-value-of-3784-17Sat, 20 Feb 2021 15:40:52 +0000A photo shop can only make a 3 to 7 enlargement of a photograph of 15 cm. Give the measurement of an enlarged photograph.
https://mathsgee.com/25135/enlargement-photograph-measurement-enlarged-photograph
A photo shop can only make a 3 to 7 enlargement of a photograph of 15 cm. Give the measurement of an enlarged photograph.Mathematicshttps://mathsgee.com/25135/enlargement-photograph-measurement-enlarged-photographSat, 20 Feb 2021 12:04:20 +0000Is Eucalyptus the scientific name for a gum tree?
https://mathsgee.com/25110/is-eucalyptus-the-scientific-name-for-a-gum-tree
Is Eucalyptus the scientific name for a gum tree?General Knowledgehttps://mathsgee.com/25110/is-eucalyptus-the-scientific-name-for-a-gum-treeSat, 20 Feb 2021 08:09:55 +0000The number 63 999 999 has exactly five prime factors. Find their sum.
https://mathsgee.com/25108/the-number-999-999-has-exactly-five-prime-factors-find-their
The number 63 999 999 has exactly five prime factors. Find their sum.Mathematicshttps://mathsgee.com/25108/the-number-999-999-has-exactly-five-prime-factors-find-theirSat, 20 Feb 2021 07:36:19 +0000Calculate the sum $\dfrac{a_0}{ a_1} + \dfrac{a_1}{ a_2} + · · · + \dfrac{a_{2008}}{ a_{2009} }$
https://mathsgee.com/25102/calculate-the-sum-dfrac-a0-a1-dfrac-a1-a2-dfrac-2008-2009
The sequence ${a0, a1, a2, . . .}$ of real numbers satisfies the recursive relation <br />
<br />
$$n(n + 1)a_{n+1} + (n − 2)a_{n−1} = n(n − 1)a_{n}$$<br />
<br />
for every positive integer $n$, where $a_0 = a_1 = 1$. <br />
<br />
Calculate the sum <br />
<br />
$$\dfrac{a_0}{ a_1} + \dfrac{a_1}{ a_2} + · · · + \dfrac{a_{2008}}{ a_{2009} }$$Mathematicshttps://mathsgee.com/25102/calculate-the-sum-dfrac-a0-a1-dfrac-a1-a2-dfrac-2008-2009Sat, 20 Feb 2021 07:13:57 +0000How many integers from 100 to 199 are divisible by 7?
https://mathsgee.com/25071/how-many-integers-from-100-to-199-are-divisible-by-7
How many integers from 100 to 199 are divisible by 7?Mathematicshttps://mathsgee.com/25071/how-many-integers-from-100-to-199-are-divisible-by-7Sat, 20 Feb 2021 02:14:04 +0000How many numbers between 7500 and 7800 are divisible by 5 but not divisible by 7 using venn diagram?
https://mathsgee.com/25069/numbers-between-7500-divisible-divisible-using-venn-diagram
How many numbers between 7500 and 7800 are divisible by 5 but not divisible by 7 using venn diagram?Mathematicshttps://mathsgee.com/25069/numbers-between-7500-divisible-divisible-using-venn-diagramSat, 20 Feb 2021 02:12:41 +0000How many 7- digit numbers are divisible by 4?
https://mathsgee.com/25068/how-many-7-digit-numbers-are-divisible-by-4
How many 7- digit numbers are divisible by 4?Mathematicshttps://mathsgee.com/25068/how-many-7-digit-numbers-are-divisible-by-4Sat, 20 Feb 2021 02:11:51 +0000How many numbers up to 350 are all divisible by 2 or 3?
https://mathsgee.com/25067/how-many-numbers-up-to-350-are-all-divisible-by-2-or-3
How many numbers up to 350 are all divisible by 2 or 3?Mathematicshttps://mathsgee.com/25067/how-many-numbers-up-to-350-are-all-divisible-by-2-or-3Sat, 20 Feb 2021 02:11:24 +0000How many numbers less than 400 but greater than 10 are divisible by 7?
https://mathsgee.com/25066/how-many-numbers-less-than-400-but-greater-than-are-divisible
How many numbers less than 400 but greater than 10 are divisible by 7?Mathematicshttps://mathsgee.com/25066/how-many-numbers-less-than-400-but-greater-than-are-divisibleSat, 20 Feb 2021 02:10:55 +0000How many positive numbers less than 1000 are divisible by 6 but not by 5?
https://mathsgee.com/25065/how-many-positive-numbers-less-than-1000-are-divisible-but-not
How many positive numbers less than 1000 are divisible by 6 but not by 5?Mathematicshttps://mathsgee.com/25065/how-many-positive-numbers-less-than-1000-are-divisible-but-notSat, 20 Feb 2021 02:10:25 +0000How many positive numbers less than 300 are divisible by 7 but not 5?
https://mathsgee.com/25064/how-many-positive-numbers-less-than-300-are-divisible-but-not
How many positive numbers less than 300 are divisible by 7 but not 5?Mathematicshttps://mathsgee.com/25064/how-many-positive-numbers-less-than-300-are-divisible-but-notSat, 20 Feb 2021 02:09:18 +0000Find the sum of all positive integers which are less than 2010 and are not divisible by 3
https://mathsgee.com/25063/find-the-positive-integers-which-are-less-than-2010-divisible
Find the sum of all positive integers which are less than 2010 and are not divisible by 3Mathematicshttps://mathsgee.com/25063/find-the-positive-integers-which-are-less-than-2010-divisibleSat, 20 Feb 2021 02:08:15 +0000How many positive integers less than 2009 are divisible by 28 but not by 12?
https://mathsgee.com/25056/how-many-positive-integers-less-than-2009-are-divisible-but
How many positive integers less than 2009 are divisible by 28 but not by 12?Mathematicshttps://mathsgee.com/25056/how-many-positive-integers-less-than-2009-are-divisible-butFri, 19 Feb 2021 05:58:58 +0000Six numbers from a list of nine integers are 4, 9, 3, 6, 7, and 3. What is the largest possible value of the median of all nine integers in this list?
https://mathsgee.com/25054/numbers-integers-largest-possible-value-median-integers-list
Six numbers from a list of nine integers are $4, 9, 3, 6, 7,$ and $3$. What is the largest possible value of the median of all nine integers in this list?Mathematicshttps://mathsgee.com/25054/numbers-integers-largest-possible-value-median-integers-listFri, 19 Feb 2021 05:57:08 +0000Define the operation $*$ by $ a * b = 4a−3b+ab$ for all $a, b ∈ R$. For what real numbers y does $12 = 3 * y$?
https://mathsgee.com/25053/define-operation-4a3b-ab-for-for-what-real-numbers-does-12
Define the operation $*$ by $ a * b = 4a−3b+ab$ for all $a, b ∈ R$. For what real numbers y does $12 = 3 * y$?Mathematicshttps://mathsgee.com/25053/define-operation-4a3b-ab-for-for-what-real-numbers-does-12Fri, 19 Feb 2021 05:56:12 +0000At least how many 3-digit composite numbers should be chosen to ensure that at least two of the chosen numbers are not relatively prime?
https://mathsgee.com/25048/composite-numbers-chosen-ensure-chosen-numbers-relatively
At least how many 3-digit composite numbers should be chosen to ensure that at least two of the chosen numbers are not relatively prime?Mathematicshttps://mathsgee.com/25048/composite-numbers-chosen-ensure-chosen-numbers-relativelyFri, 19 Feb 2021 05:45:58 +0000Give the prime factorization of $3^{20} + 3^{19} − 12$.
https://mathsgee.com/25045/give-the-prime-factorization-of-3-20-3-19-12
Give the prime factorization of $3^{20} + 3^{19} − 12$.Mathematicshttps://mathsgee.com/25045/give-the-prime-factorization-of-3-20-3-19-12Fri, 19 Feb 2021 05:42:46 +0000Find the largest integer that divides all terms of the sequence ${a_n}$, where $a_n = n^5 −n, n ≥ 1$.
https://mathsgee.com/25043/find-largest-integer-that-divides-terms-sequence-where-an
Find the largest integer that divides all terms of the sequence ${a_n}$, where $a_n = n^5 −n, n ≥ 1$.Mathematicshttps://mathsgee.com/25043/find-largest-integer-that-divides-terms-sequence-where-anFri, 19 Feb 2021 05:40:55 +0000Chuckie was born before the year 2000. This year 2008, his age is exactly the sum of the digits of his year of birth. How old is Chuckie now?
https://mathsgee.com/25040/chuckie-born-before-year-2000-exactly-digits-birth-chuckie
Chuckie was born before the year 2000. This year 2008, his age is exactly the sum of the digits of his year of birth. How old is Chuckie now?Mathematicshttps://mathsgee.com/25040/chuckie-born-before-year-2000-exactly-digits-birth-chuckieFri, 19 Feb 2021 05:38:00 +0000There are three prime numbers, each one of them is greater than two score but less than four dozens. Find the sum of these three numbers
https://mathsgee.com/25028/there-three-numbers-greater-score-dozens-these-three-numbers
There are three prime numbers, each one of them is greater than two score but less than four dozens.<br />
<br />
Find the sum of these three numbersMathematicshttps://mathsgee.com/25028/there-three-numbers-greater-score-dozens-these-three-numbersThu, 18 Feb 2021 07:17:05 +0000What is the sum when all these products are added?
https://mathsgee.com/25027/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 when all these products are added?Mathematicshttps://mathsgee.com/25027/what-is-the-sum-when-all-these-products-are-addedThu, 18 Feb 2021 00:32:49 +0000An operation $∗$ on the set of positive integers is defined by $a ∗ b = (a + b)^{a−b}$ . Evaluate:
https://mathsgee.com/25019/operation-the-set-positive-integers-defined-ab-evaluate
An operation $∗$ on the set of positive integers is defined by $a ∗ b = (a + b)^{a−b}$ . Evaluate:<br />
<br />
$$1024 ∗ (512 ∗ (256 ∗ (128 ∗ (64 ∗ (32 ∗ (16 ∗ (8 ∗ (4 ∗ (2 ∗ 1)))))))))$$Mathematicshttps://mathsgee.com/25019/operation-the-set-positive-integers-defined-ab-evaluateThu, 18 Feb 2021 00:13:07 +0000Let x be the solution of the equation
https://mathsgee.com/25009/let-x-be-the-solution-of-the-equation
<p>Let $x$ be the solution of the equation:
<br>
<br>$\dfrac{x+1}{1}+\dfrac{x+2}{2}+\dfrac{x+3}{3}+ ... + \dfrac{x+2007}{2007}+\dfrac{x+2008}{2008} = 2008$</p>
<p>Which of the following is true?</p>
<ul>
<li>$x>1$</li>
<li>$x=1$</li>
<li>$0<x<1$</li>
<li>$x\leq 0$</li></ul>Mathematicshttps://mathsgee.com/25009/let-x-be-the-solution-of-the-equationWed, 17 Feb 2021 23:44:20 +0000How many 4-digit positive numbers, whose digits are from the set {1, 2, 3, 4}, are divisible by 4?
https://mathsgee.com/25007/how-many-digit-positive-numbers-whose-digits-from-divisible
How many 4-digit positive numbers, whose digits are from the set {1, 2, 3, 4}, are divisible by 4?Mathematicshttps://mathsgee.com/25007/how-many-digit-positive-numbers-whose-digits-from-divisibleWed, 17 Feb 2021 23:40:51 +0000Find the sum of all the 4-digit positive numbers with no zero digit.
https://mathsgee.com/25004/find-the-sum-of-all-the-digit-positive-numbers-with-zero-digit
Find the sum of all the 4-digit positive numbers with no zero digit.Mathematicshttps://mathsgee.com/25004/find-the-sum-of-all-the-digit-positive-numbers-with-zero-digitWed, 17 Feb 2021 23:35:51 +0000Let $0 <x<1$. Which of the following has the largest value?
https://mathsgee.com/25003/let-0-x-1-which-of-the-following-has-the-largest-value
<p>Let $0 <x<1$. Which of the following has the largest value? </p>
<ul>
<li>$x^3$</li>
<li>$x^2 + x$</li>
<li>$x^2 +x^3$</li>
<li>$x^4$ </li></ul>Mathematicshttps://mathsgee.com/25003/let-0-x-1-which-of-the-following-has-the-largest-valueWed, 17 Feb 2021 23:35:10 +0000Find the largest integer value of $n$ such that $1\times 3 \times 5 \times 7\times · · ·\times 31 \times 33 \times 35$ is divisible by $3^n$
https://mathsgee.com/25002/largest-integer-times-times-times-times-times-times-divisible
Find the largest integer value of $n$ such that $1\times 3 \times 5 \times 7\times · · ·\times 31 \times 33 \times 35$ is divisible by $3^n$Mathematicshttps://mathsgee.com/25002/largest-integer-times-times-times-times-times-times-divisibleWed, 17 Feb 2021 23:33:22 +0000A number is written using each of the digits 1,4,6,7, and 8 exactly once. The number is greater than 48682 and less than 48722. What is the number?
https://mathsgee.com/24763/number-written-digits-exactly-number-greater-48682-number
A number is written using each of the digits 1,4,6,7, and 8 exactly once. The number is greater than 48682 and less than 48722. What is the number?Mathematicshttps://mathsgee.com/24763/number-written-digits-exactly-number-greater-48682-numberWed, 10 Feb 2021 08:15:20 +0000If 9999=4 ; 8888=8 ; 1818=4 ; 1212=0 then 1919=?
https://mathsgee.com/24761/if-9999-4-8888-8-1818-4-1212-0-then-1919
If 9999=4 ; 8888=8 ; 1818=4 ; 1212=0 then 1919=?Mathematicshttps://mathsgee.com/24761/if-9999-4-8888-8-1818-4-1212-0-then-1919Wed, 10 Feb 2021 08:10:08 +0000Two vectors are multiplied together. The answer that is produced is also a vector. What kind of multiplication is this?
https://mathsgee.com/24722/vectors-multiplied-together-produced-vector-multiplication
Two vectors are multiplied together. The answer that is produced is also a vector. What kind of multiplication is this?Mathematicshttps://mathsgee.com/24722/vectors-multiplied-together-produced-vector-multiplicationSun, 07 Feb 2021 03:10:34 +0000The product of two numbers is 42 869. When the two numbers are added together and the result is squared, the answer is 181 476. What are the two numbers?
https://mathsgee.com/24702/product-numbers-numbers-together-result-squared-answer-numbers
The product of two numbers is 42 869. When the two numbers are added together and the result is squared, the answer is 181 476.<br />
What are the two numbers? Try to work this out without using a calculator.Mathematicshttps://mathsgee.com/24702/product-numbers-numbers-together-result-squared-answer-numbersThu, 04 Feb 2021 11:47:43 +0000What is $ [(12 + 8) ÷ (7 − 2) + 3] × 4$ ?
https://mathsgee.com/24698/what-is-12-8-7-2-3-4
What is $ [(12 + 8) ÷ (7 − 2) + 3] × 4$ ?Mathematicshttps://mathsgee.com/24698/what-is-12-8-7-2-3-4Wed, 03 Feb 2021 17:01:37 +0000What is Geometry?
https://mathsgee.com/24358/what-is-geometry
What is Geometry?Mathematicshttps://mathsgee.com/24358/what-is-geometrySun, 31 Jan 2021 01:39:54 +0000Explain in a complicated calculation like $8 + (9 \times 52 + 8)$ from where you will start calculation?
https://mathsgee.com/24357/explain-complicated-calculation-times-where-calculation
Explain in a complicated calculation like $8 + (9 \times 52 + 8)$ from where you will start calculation?Mathematicshttps://mathsgee.com/24357/explain-complicated-calculation-times-where-calculationSun, 31 Jan 2021 01:39:21 +0000Sort these numbers from small to large:
https://mathsgee.com/24597/sort-these-numbers-from-small-to-large
Sort these numbers from small to large:<br />
<br />
1251; 1452; 1254; 1245; 1542Mathematicshttps://mathsgee.com/24597/sort-these-numbers-from-small-to-largeFri, 29 Jan 2021 12:47:14 +0000Suppose 7+3=z. Find a different pair of numbers x,y where x+y=z
https://mathsgee.com/24341/suppose-7-3-z-find-a-different-pair-of-numbers-x-y-where-x-y-z
<p>Suppose $7+3=z$. Find a different pair of numbers $x,y$ where $x+y=z$</p>
<p><img alt="" src="https://www.mathsgee.com/?qa=blob&qa_blobid=15085895461173551141" style="height:337px; width:600px"></p>Mathematicshttps://mathsgee.com/24341/suppose-7-3-z-find-a-different-pair-of-numbers-x-y-where-x-y-zThu, 28 Jan 2021 04:13:46 +0000Using only addition, how do you add eight 8's and get the number 1000?
https://mathsgee.com/24340/using-only-addition-how-you-add-eight-and-get-the-number-1000
<p>Using only addition, how do you add eight 8's and get the number 1000?</p>
<p><img alt="" src="https://www.mathsgee.com/?qa=blob&qa_blobid=6055468387426041584" style="height:315px; width:600px"></p>
<p> </p>Mathematicshttps://mathsgee.com/24340/using-only-addition-how-you-add-eight-and-get-the-number-1000Thu, 28 Jan 2021 04:11:55 +0000Are there an infinite number of prime numbers?
https://mathsgee.com/24319/are-there-an-infinite-number-of-prime-numbers
Are there an infinite number of prime numbers?Mathematicshttps://mathsgee.com/24319/are-there-an-infinite-number-of-prime-numbersSun, 24 Jan 2021 19:04:50 +0000Convert 0.39393939... to a fraction
https://mathsgee.com/24312/convert-0-39393939-to-a-fraction
Convert 0.39393939... to a fractionMathematicshttps://mathsgee.com/24312/convert-0-39393939-to-a-fractionFri, 22 Jan 2021 05:05:10 +0000Convert $3\dfrac{2}{5}$ to an improper fraction
https://mathsgee.com/24311/convert-3-dfrac-2-5-to-an-improper-fraction
Convert $3\dfrac{2}{5}$ to an improper fractionMathematicshttps://mathsgee.com/24311/convert-3-dfrac-2-5-to-an-improper-fractionFri, 22 Jan 2021 04:47:05 +0000If p, x, and y are positive integers, y is odd, and p = x^2 + y^2, is x divisible by 4?
https://mathsgee.com/24307/if-p-and-are-positive-integers-is-odd-and-p-x-2-y-is-divisible-by
If p, x, and y are positive integers, y is odd, and p = x^2 + y^2, is x divisible by 4?Mathematicshttps://mathsgee.com/24307/if-p-and-are-positive-integers-is-odd-and-p-x-2-y-is-divisible-byThu, 21 Jan 2021 07:54:19 +0000When 51^25 is divided by 13, the remainder obtained is:
https://mathsgee.com/24306/when-51-25-is-divided-by-13-the-remainder-obtained-is
When 51^25 is divided by 13, the remainder obtained is:Mathematicshttps://mathsgee.com/24306/when-51-25-is-divided-by-13-the-remainder-obtained-isThu, 21 Jan 2021 07:44:20 +0000If the remainder is 7 when positive integer n is divided by 18, what is the remainder when n is divided by 6?
https://mathsgee.com/24304/remainder-when-positive-integer-divided-remainder-divided
If the remainder is 7 when positive integer n is divided by 18, what is the remainder when n is divided by 6?Mathematicshttps://mathsgee.com/24304/remainder-when-positive-integer-divided-remainder-dividedThu, 21 Jan 2021 07:07:05 +0000If s and t are positive integers such that s/t = 64.12, which of the following could be the remainder when s is divided by t ?
https://mathsgee.com/24302/positive-integers-which-following-could-remainder-divided
If s and t are positive integers such that s/t = 64.12, which of the following could be the remainder when s is divided by t ?Mathematicshttps://mathsgee.com/24302/positive-integers-which-following-could-remainder-dividedThu, 21 Jan 2021 06:57:22 +0000Positive integer n leaves a remainder of 4 after division by 6 and a remainder of 3 after division by 5. If n is greater than 30, what is the remainder that n leaves after division by 30?
https://mathsgee.com/24301/positive-remainder-division-remainder-division-remainder
Positive integer n leaves a remainder of 4 after division by 6 and a remainder of 3 after division by 5. If n is greater than 30, what is the remainder that n leaves after division by 30?Mathematicshttps://mathsgee.com/24301/positive-remainder-division-remainder-division-remainderThu, 21 Jan 2021 06:52:44 +0000Find all the factors of 45
https://mathsgee.com/24299/find-all-the-factors-of-45
Find all the factors of 45Mathematicshttps://mathsgee.com/24299/find-all-the-factors-of-45Thu, 21 Jan 2021 06:50:37 +0000Using only elementary geometry show that the angle C is equal to angle A plus angle B; that is C=A+B
https://mathsgee.com/24031/using-elementary-geometry-show-angle-equal-angle-plus-angle
<p>Using only elementary geometry show that the angle C is equal to angle A plus angle B; that is C= A + B</p>
<p><img alt="" src="https://mathsgee.com/?qa=blob&qa_blobid=16054605606340516765" style="height:337px; width:600px"></p>
<p> </p>Mathematicshttps://mathsgee.com/24031/using-elementary-geometry-show-angle-equal-angle-plus-angleWed, 13 Jan 2021 03:39:02 +0000How is 100-75÷5=85 on a calculator but is equal to 5 when solved on paper?
https://mathsgee.com/24010/how-is-100-75-85-on-calculator-but-is-equal-to-when-solved-paper
How is 100-75÷5=85 on a calculator but is equal to 5 when solved on paper?Mathematicshttps://mathsgee.com/24010/how-is-100-75-85-on-calculator-but-is-equal-to-when-solved-paperMon, 11 Jan 2021 01:15:48 +0000