I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

Can you write down eight eights so that they add up to one thousand?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?