If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

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?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

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?

Find out the number of circles in the given picture having Illusion

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

Take away the whole and some still remain. What is it?