P is a prime number and (P<sup>2</sup> + 3) is also a prime number . The no. of numbers that P can assume …

Which of the following is a perfect square ?

The number 142<sup>2</sup> - 1 is divisible by :

A number exceeds its two fifth by 75. The number is :

On a road three consecutive traffic lights change after 36, 42 and 72 seconds respectively. If the lights are first swit…

A number of boys raised Rs. 400 for a famine relief fund, each boy giving as many 25 paise coins as there were boys. Th…

The four digit smallest positive number which when divided by 4, 5, 6 or 7, it leaves always the remainder as 3:

The number of two digit prime numbers which remain prime even inverting the position of its digits is: