Can you find out which options fits best with the missing column?

How can you make number one disappear by adding something to it?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Move three sticks of the spiral below to form a square.

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.

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

What happened when the wheel was invented?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT