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

Some birds settled on the branches of a tree. First, they sat one to a branch and there was one bird too many. Next they…

The sum of the squares of 3 consecutive positive numbers is 365. The sum of the numbers is -

If the difference between the reciprocal of a positive proper fraction and fraction itself be $$\frac{{17}}{{72}}$$ , t…

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

What will be the unit digit in the 7<sup>105</sup> ?

12345679 × 72 is equal to -

The sum and products of two numbers are 12 and 35 respectively. The sum of their reciprocals will be: