Number System, Problems on Number

What is the greatest prime factor of (2⁴)² - 1 ?

(√1372 + √959) ÷ √292 × 19.003 = ?

For which of the following value of s is (50 +S)/S an integer?

What is the difference of largest and smallest prime number between 60 and 80?

If 100 is divided into two parts in such a way that the sum of their reciprocals is 1/21, the difference between the two parts is -

Find the largest number of 5-digits which, when divided by 16, 24, 30 or 36, leaves the same remainder 10 each case.

P and Q are two positive integers such that PQ = 64. Which of the following cannot be the value of P + Q?

A garden of 100 meter length and 60 meter width has a walkway of 2 meter width on every side. What is the area of the garden, in square meters, excluding the walkway?

19.99 × 9.9 + 99.9 =?

One million two thousand and two is written as-

a, b, c, d and e are five consecutive integers in increasing order of size. Which one of the following expression is not odd?

The sum of three consecutive multiples of 3 is 72. What is the largest number?

4,7,8,4 = 26

2% of 2 = ?

If n is an even integer, which of the following must be an odd integer?

(52.02² - 34.01²)÷17.99 × √? = 1,720

A sport club has 50 members. Of these, 35 play golf, 30 play soccer and 18 play both golf and soccer. How members do play neither golf nor soccer?

The H C F of x² - 1, x⁴ - 1 and x⁴ - x³ + x - 1 is -

How many positive integers less than 100 have a remainder of 2 when divided by 13?

What is the number of divisor of 1008?