Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

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.

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

Can you fill the blank with the correct number?

6 30 870 756030 _____

How many times in a given day, minutes and hour clock comes in a straight line ?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

I don't get anymore wetter, no matter how much rain falls on me.