Find the total number of books can be fitted in the box.

If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?

A bat and ball cost Rs 110 in total. The bat costs Rs 100 more than the ball. How much does the ball cost?

In a lake, there is a patch of Lily pads. Every day, the patch doubles in size. if it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?

How many times can you substract 10 from 100 ?

If there are 6 apples and you take away 4,how many do you have ?

In a certain city, 5% of all the persons in town have ulisted phone number. If you select 100 names at random from that city's phone directory, how many people selected will have unlisted phone number ?

All 5 sisters are busy.

Anni is reading a book,

Rose is cooking,

Katy is playing chess

and Mary is doing the laundry,

what is the fifth sister doing ?

You are driving a bus with 10 people on it. At the first stop 4 people get off, and 2 get on. At the next stop 3 people get off, and 5 get on. And the last stop, 6 people get off, and only 1 gets on.

How old is the bus driver?