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

How many digit required to write numbers from 1 to 50 ?

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

The product of two numbers is 120 and the sum of their squares is 289. The sum of the two number is -

On multiplying a number by 7 all the digit in the product appear as 3's , the smallest such numbers is -

A man read $$\frac{2}{5}$$ th of a book on the first day. He read $$\frac{1}{3}$$ rd more on second day than he read in …

The sum of first five prime numbers is:

Find the remainder when 67<sup>107</sup> is divided by 7.