The difference between the squares of two consecutive odd integers is always divisible by:

If p and q are the two digits of the number 653pq such that this number is divisible by 80, then p+q is equal to :

A six-digit number is formed by repeating a three-digit number; for example, 256256 or 678678 etc. Any number of this form is always exactly divisible by :

If -1 ≤ a ≤ 2 and 1 ≤ b ≤ 3, then least possible value of (2a – 3b) is:

A girl multiplies 987 by a certain number and obtains 559981 as her answer. If in the answer, both 9’s are wrong but the other digits are correct, then the correct answer will be

One-quarter of one-seventh of a land is sold for Rs. 30,000. What is the value of an eight thirty-fifth of load?

If the number 653ab is divisible by 90, then (a + b) = ?

If (64)2 - (36)2 = 20 x a, then a = ?

$(y^{n} - b^{n}) $is completely divisible by (y - b), when

How many of the following numbers are divisible by 3 but not by 9. 4320, 2343, 3474, 4131, 5286, 5340, 6336, 7347, 8115, 9276