What has a ring but no finger?

Can you tell a 3D object that has just two surfaces?

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.

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

John was gifted a new Hayabusa. He drove x miles at 55mph. Then he drove x+20 miles at 40mps. He drove his bike for 100 minutes. How much distance did he travel?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Can you write down eight eights so that they add up to one thousand?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.