Three numbers which are co-prime to one another are such that the product of the first two is 551 and that of last two i…

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

Three friends, returning from a movie, stopped to eat at a restaurant. After dinner, they paid their bill and noticed a …

64329 is divided by a certain number, 175, 114 and 213 appears as three successive remainders. The divisor is -

The sum of three consecutive odd natural numbers each divisible by 3 is 63. What is the largest among them ?

$$0.\overline {142857} \div 0.\overline {285714} \,$$    is equal to :

The sum of 10 terms of the arithmetic series is 390. If the third term of the series is 19. Find the first term :

The remainder when 4<sup>0</sup> + 4<sup>1</sup> + 4<sup>2</sup> + 4<sup>3<…