Number System MCQs

Find the LCM and HCF of 2.5, 0.5 and 0.175.

Find the HCF of (3125-1) and (335-1).

The last digit of the number obtained by multiplying the numbers 81 × 82 × 83 × 84 × 86 × 87 × 88 × 89 will be

The sum of the digits of two-digit number is 10, while when the digits are reversed, the number decrease by 54. Find the changed number.

If A381 is divisible by 11, find the value of the smallest natural number A?

If 381A is divisible by 9, find the value of the smallest natural number A?

A forester wants to plant 44 apples tree, 66 banana trees and 110 mango trees in equal rows (in terms of number of trees). Also, he wants to make distinct rows of tree (i.e. only one type of tree in one row). The number of rows (minimum) that required is:

The greatest number which will divides: 4003, 4126 and 4249, leaving the same remainder in each case:

Find the number of divisors of 1420.