Ashok earns and income of Rs. 1 on the first day of his business. On every subsequent day, he earns an income which is just double of that made on the previous day. On the 10th day of his business, his income is :
The difference of the squares of two consecutive even natural numbers is 92. Find the larger of the two :
A copper sphere of radius 3 cm is beaten and drawn into a diameter of 0.2 cm. The length of the wire is :
In a school of 250 pupils, 100 are girls and 200 pupils stay at school for lunch. If 40 girls go home for lunch, find the number of boys who go home for lunch :
A and B are in the ratio 5:3; if A=35: B is:
A and B together can do a piece of work in 6 days. A alone can do it in 8 days. In how many days can B alone do it?