There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Find out the missing number in the picture attached:

A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.

Can you calculate the distance travelled by each tyre on that journey?

Solve the mathematical equation in the picture below.

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?