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Number Theory
Page 2
Questions (6,260)
explain why 36 is a multiple of 4 but 26 is not
5 answers
asked by
emy
782 views
The only perfect number of the form x^n + y^n
5 answers
asked by
l
982 views
the smallest integer which is an exact multiple of both 60 and 126
5 answers
asked by
martabak
2,717 views
What is the smallest number that can round to 2,000,000 when rounded to the nearest 10,000
9 answers
asked by
Ciara
3,071 views
If a number is chosen at random from integers 5 to 25 inclusive, find the probability that the number is (a) multiple of 5 or 3
7 answers
asked by
Queeneth
3,536 views
What is the greatest number, which has the billions period as it's last period? write this number in words too.
1 answer
asked by
David
42 views
A positive whole number is called stable, if at least one of its digits has the same value as its position in the number.
10 answers
asked by
Denny
3,686 views
What is the probability that a randomly selected three-digit number has the property that one digit is equal to the product of
15 answers
asked by
Anonymous
5,697 views
Andrew arranged the number 1, 2, 3, ...11, 12 into six pairs so that the sum ofany two numbers in a pair is prime and no two of
5 answers
asked by
Jane
2,220 views
Hi. I found this question on a Math Counts practice test and it seriously confused me. I've never learned about this, and it
4 answers
asked by
Sahana
1,662 views
Solve the mathematical puzzle.
Determine the digits of Z from these clues. The fourth digit of Z is the largest prime factor of
4 answers
asked by
beyonce
1,535 views
Write all possible 3-digit numbers sum of whose digits is 12
5 answers
asked by
Misthi
1,834 views
what is the positive difference between the two largest prime factors of 159,137?
4 answers
asked by
shauna
1,015 views
The difference between the two digits of a two digit number is 2. If the digits swap places,the number is 18 less than the
5 answers
asked by
Lara
1,681 views
What is the greatest prime factor of 3105?
4 answers
asked by
francis
1,374 views
Find the largest three-digit number that can be written in the form 3^m + 2^n, where m and n are positive integers.
5 answers
asked by
Mr. Alexander
5,028 views
Which statement is true about 35 and 34?
4 answers
asked by
Kendell
1,518 views
If p and q are relatively prime, then GCF(p,q) = ______, and LCM(p,q) = _______.
4 answers
asked by
Isa
1,966 views
Show that each number is a rational number by writing it as the quotient of two integers.
1. 37 2. -3 1/5 3. 9.2 4. -0.23
3 answers
asked by
Evelyn
1,670 views
What is the HCF / GCF of 120, 180 and 190
in prime factorisation method
4 answers
asked by
Manasvi
1,206 views
A magic square is a square of numbers with each row, column, and diagonal of the square adding up to the same sum, called the
2 answers
asked by
Michelle
629 views
Is 14/3 a rational number? I think so... but I'm confused because if you divide 14 by 3 then the decimal part is
7 answers
asked by
LILY
2,907 views
Suppose n is an integer. Select all statements below that are true: (choose 3)
A) n^2 + n is always an even integer*** B) n^2 + n
10 answers
asked by
Gerard Way
12,020 views
How many even natural-number factors does $n = 2^2 \cdot 3^1 \cdot 7^2$ have?
10 answers
asked by
Logan
3,549 views
how many two-digit primes have a ones digit of 1????????????????????
got no clue
7 answers
asked by
amad
4,187 views
John chooses a 5-digit positive integer and deletes one of its digits to make a 4-digit number. The sum of this 4-digit number
10 answers
asked by
Amitabha
4,359 views
Find the smallest positive integer not relatively prime to 2015 that has the same number of positive divisors as 2015.
11 answers
asked by
david
5,464 views
the product of 1000 whole number is 1000, what is the largest possible value the sum of these numbers can have
5 answers
asked by
julie
2,010 views
A three digit number is such that twice the hundreds digit is more the teens digit by two.The unit digit is thrice the hundreds
4 answers
asked by
Peter
1,516 views
If a and b are two positive co-prime integers such that a = 12b then
HCF (a, 12) =
4 answers
asked by
Kaur
1,032 views
Given that the HCF of a pair of different numbers is 8, find the two numbers if both numbers are less than 20
4 answers
asked by
Pepsi Zero Sugar
794 views
the only perfect number of the form x(n) + y(n)
A perfect number is an integer that is equal to the sum of its positive divisors
4 answers
asked by
Mike
914 views
The HCF and LCM of two numbers are 8 and 504 respectively.If one of the numbers is 56,find the smallest value of the other
3 answers
asked by
Kin shing
892 views
What is the sum of all prime numbers less than 500 with only 3s and 4s as digits
4 answers
asked by
Mags
1,114 views
What is the smallest positive integer by which 180 should be multiplied to obtain a perfect square? Thank you
4 answers
asked by
PLEASE HELP
644 views
FIND THE LEAST NUMBER BY WHICH 21168 MUST BE DIVIDED IN ORDER TO YIELD A PERFECT SQUARE ?
5 answers
asked by
eman fatima
3,409 views
what is the smallest number i have to multiply with 315 to get a perfect square?
3 answers
asked by
someone
415 views
What is the third number in the 156th row of Pascal's triangle?
I know that it is 154 x ___ how do I find out the number? thanks
5 answers
asked by
sh
643 views
Develop An Algorithm And Draw the Flowcharts To Find the Sum of Odd Numbers Between 100 And 200
5 answers
asked by
Anonymous
8,702 views
What is the smallest number that can be divided exactly by 3 5 and 7
7 answers
asked by
Dara
92 views
the boys of a school can be arranged in 12, 15, 18 equal rows and also into a solid square. what is the least number of boys
10 answers
asked by
tanzil
9,789 views
How many integers $m$ are there such that $0<m<100$ and $\gcd(m,100)$ is a single-digit number?
13 answers
asked by
Joy F
3,414 views
Given a four digit number XXXX, are there more permutations if repetition is allowed or not allowed?
5 answers
asked by
Anonymous
2,330 views
find the largest number of four digits which is exactly divisible by 18 25 and 35
6 answers
asked by
Ali
1,471 views
If the digits of the number are reversed, the number is increased by 36. The sum of the digits in the number is two and
5 answers
asked by
Marie
4,488 views
The tens digit in a two-digit number is one more than the units digit. The difference between this number and the reverse number
10 answers
asked by
HELP
2,388 views
How many positive three-digit integers with each digit greater than 4 are divisible by 6??
6 answers
asked by
Zach Bringer
3,639 views
If m and p are positive integers and (m + p)x m is even, which of the following must be true? Would it be: (A) if m is odd, then
4 answers
asked by
Carol Kelly
1,763 views
Lucy is thinking of a number. The number is greater than two hundred twenty-five. Her number is less than 2 hundreds 2 tens 7
12 answers
asked by
Sahara
4,179 views
What is the greatest prime number you must consider to test whether 5141 is prime?
5 answers
asked by
timothy
7,387 views
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