I know a nine-letter word having only one vowel.
Do you ?

What has 88 keys?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

I can be cracked, made, told, and played. What am I?

what does the below rebus means?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

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

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