MEDIUM
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Consider a 6-digit number of the form XYXYXY. The number is divisible by:

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Important Questions on Playing with Numbers

HARD
Let N1=255+1 and N2=165. Then
EASY
Which smallest number must be added to 300. So that the resulting number is completely divisible by 13?
MEDIUM

How many numbers are there from 14 to 159 which are divisible by both 2 and 8?

EASY
The greatest number which should be replace '*' in the number 146*48 to make it divisible by 8 is:
MEDIUM
Which of the following numbers is divisible by 9
 
HARD
A 5-digit number abcde, when multiplies by 9, gives the 5-digit number edcba. The sum of the digits in the number is
MEDIUM
How many numbers are there between 330 and 450 which are divisible by both 7 and 9?
MEDIUM
What is the sum of the digits of the least number which when divided by 15,18 and 36 leaves the same remainder 9 in each case and is divisible by 11?
MEDIUM
A number M is divisible by 25. If (M+5) (M+1) is divided by 25, then what will be the remainder?
EASY
Which of the given value is exactly divisible by 30?
EASY
The number 30744 is divisible by which of the single digit numbers:
HARD
Let n>1 be an integer. Which of the following sets of numbers necessarily contains a multiple of 3?
MEDIUM
If r is the remainder when each of 4749, 5601 and 7092 is divided by the greatest possible number d (>1), then the value of (d + r) will be _____.
EASY

Consider the following two statements :

I. If n is a composite number, then n divides n-1!

II. There are infinitely many natural numbers n such that n3+2n2+n divides n!

Then

MEDIUM
If a nine-digit number 785x3678y is divisible by 72, then value of (x+y) is _____.
EASY

Product of four consecutive positive integers is divisible by _____.

EASY
The smallest number that should be subtracted from 2085, so that the new number is completely divisible by 23 is:
EASY
A number when divided by 72 leaves remainder 10. What will be the remainder when the same number is divided by 9?
EASY
Which of the following numbers is perfectly divisible by 4?
MEDIUM

Consider the following statements: For any integer n, 

I.. n2+3 is never divisible by 17 .

II.. n2+4 is never divisible by 17. Then