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?

What four weights can be used to balance from 1 to 30 pounds?

Can you find out the missing number in the grid?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

Buy me, smell me or deliver me, I do not change.

Who am I?

What question can you never answer yes to?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

The answer I give is yes, but what I mean is no. What was the question?