Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

What has many keys but can’t open a single lock?

Can you count the number of triangles in the picture below?

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

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

Rearrange the letters in "new door" to make one word.

I am quite hot but become too cold if you remove the first two letters. What am I?

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.

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?