3
6
9
12
How many seconds in 10 years?
How many seconds will a 500 metre long train take to cross a man walking with a speed of 3 km/hr in the direction of the moving train if the speed of the train is 63 km/hr?
How many sides does a regular polygon have whose interior and exterior angle are in the ratio 2 : 1 ?
How many such pairs of digits are there in the number 421579368 each of which has as many digits between them in the number as when they are arranged in ascending order?
How many terms are there in 20, 25, 30 . . . . . . 140?
How many terms are there in the GP 5, 20, 80, 320........... 20480?
How many times does the 29th day of the month occur in 400 consecutive years?
How many times in 24 h the hands of a clock are in straight line but opposition in directions?
How many times in a day (24 Hrs) are the hands of a clock are in a perpendicular to each other ?
How many times in a day (24 Hrs) are the hands of a clock are in a straight line ?