By how much does $$\frac{6}{{\frac{7}{8}}}$$ exceed $$\frac{{\frac{6}{7}}}{8}$$ ?

$$\left( {{2^{71}} + {2^{72}} + {2^{73}} + {2^{74}}} \right)$$     is divided by :

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…

Which one of the following is a prime number ?

If (-1)<sup>n</sup> + (-1)<sup>4n</sup> = 0, then n is

11 * X = $$\frac{{693}}{9}$$

The difference of a number consisting of two digits from the number formed by interchanging the digits is always divisib…

If in a three digits number the last two digits places are interchanged a new number is formed which is greater than the…