As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

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.

Which English verb becomes past tense just by rearranging the letters?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?

By what process could you make a 'Tea-Table' into food?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

What does this simple rebus mean?

10+10 and 11+11 can give you the same answer.

Explain how?

I look at you, you look at me, I raise my right, you raise your left. What am I?