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.

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

If a wheel has 54 spokes, how many spaces are there between the spokes?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

What word is represented by this rebus?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

The Little ant seems to be always confused. Do you know why?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?