What is the capacity of a convex lens?

The interest compounded annually on a sum of Rs. 56000 at a rate of 7% p.a. after 3 years is what percentage of the simple interest on a sum of Rs. 72000 at a rate of 9% p.a. after 5 years?

Select the most appropriate sentence with respect to grammar and usage.

A statement is given below followed by two arguments numbered I and II. You have to decide which of the arguments is a 'strong' argument and which is a 'weak' argument.

Statement:
 Should foreign films be banned in India?

Arguments:
 I. Yes, they depict an alien culture which adversely affects our values.
 II. No, foreign films are of a high artistic standard.

A man can row 10 km/h in still water. When the river is running at a speed of 4.5 km/h, then it takes him 2 h to row to a place and comes back to the initial point . How far is the place (in km) (rounded off to two decimal places)?

Which scientist awarded the Padma Shri, who played an important role in making the light combat aircraft Tejas, died of a heart attack at the age of 78?

What will be come in place of question mark(?) in the following number series?
3, 22, ? , 673, 2696, 8093

A man has eaten 100 grapes in 5 days. He eats 6 more grapes every day in comparison to the previous day. How many grapes did he eat on the first day?