EASY
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Write the first five multiples of the following number:
9 

Important Questions on Prime Time

MEDIUM

Which of the following statement(s) is/are true?

I. There are 12 multiples of 9 from 7 to 109.

II. There are 9 multiples of 13 from 19 to 119.

MEDIUM
How many positive factors of 24 are there?
EASY
Which of the following number is completely divisible by 4?
EASY
One of the factors of 82k+52k, where k is an odd number, is:
EASY

The total number of factors of 1156 is: 

(A) 9 

(B) 8 

(C) 10 

(D) 11 

MEDIUM
The number of factors of 3600 is:
EASY
How many positive factors of 68 are there?
EASY
If the number 87m6203m is divisible by 6, then find the sum of all possible values of 'm'.
EASY

The sum of all the factors of 156 is: 
(A) 392
(B) 235
(C) 390
(D) 379

EASY

The prime factorisation of 240 is:

(A) 23×32×5 

(B) 24×32×5

(C) 24×3×5

(D) 25×3×5

 

EASY
Find the largest 2-digit number N which is divisible by 4, such that all integral power of N end with N.
EASY
How many numbers between 500 and 1000 are divisible by 13?
EASY
If A is the smallest three-digit number divisible by both 6 and 7 and B is the largest four digit number divisible by both 6 and 7, then what is the value of B-A?
EASY
Calculate the total number of prime factors in the expression:

911×57×75×32×172

MEDIUM
Let S be the set of all ordered pairs (x, y) of positive integers satisfying the condition x2-y2=12345678. Then
EASY
If the six-digit number 5z3x4y is divisible by 7,11 and 13, then what is the value of x+y-z?
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If the number 34k56k is divided by 6, then what will be the largest value of k?
MEDIUM
If A is the smallest three-digit number divisible by both 6 and 7also B is the largest four-digit number divisible by both 6 and 7, Then what is the value of B - A?
MEDIUM

What is the number of Prime factor in 1518×410×69.

EASY
How many two digit numbers are divisible by 9