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

How is this possible?

Can you replace the question mark with the correct number in the below table sequence?

What is the next number in this series?

4,12,84,3612....

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?