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

Give it food and it will live; give it water and it will die.

How can I get the answer 24 by only using the numbers 8,8,3,3?

You can use the main signs add, subtract multiply and divide.

Find the next number in the series below

21 32 54 87 131 ?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

What is the largest number you can write with just 3 digits?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

By using 'because' continuously three times, can you make an English statement ?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?