I am an odd number. Take away a letter and I become even. What number am I?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

Find the value of "?" in the ball picture Riddle below:

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

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 ?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?