I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

What word begins and ends with an E, but has only one letter?

Find the missing letter in the last circle logically in the given below picture.

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?

If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many. How many cages and canaries do I have?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

Find the next number in the series below

21 32 54 87 131 ?