I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

Can you identify the famous TV character from the rebus below?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

What can go up a chimney down, but can’t go down a chimney up?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?