Find the least number of five digits which when divided by 40, 60, and 75, leave remainders 31, 51 and 66 respectively.

Which of the following is a prime number ?

$$999\frac{{98}}{{99}} \times 99$$   is equal to :

The unit digit of (316)<sup>3<sup>4n</sup></sup> + 1 is :

$$1 + \frac{1}{2} + \frac{1}{4} + \frac{1}{7} + \frac{1}{{14}} + \frac{1}{{28}}$$     is equal to :

The highest power of 17 which can divide exactly the following:<br /> (18<sup>2</sup> - 1) (18<sup&…

5349 is added to 3957. Then 7062 is subtracted from the sum. The result is not divisible by :

If we divide the unknown two-digit number by the number consisting of the same digits written in the reverse order, we g…