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 can you catch but never throw?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

what's the probability of getting a king or a queen from a pack of 52 cards?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

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?

There is a family that live in a round house. The two parents go out for a movie and leave a babysitter to watch their son. They come back and the kid was not there. Some one kidnapped him. The maid said she was cleaning in a corner. The cook said he was making pizza. The babysitter said she was getting a board game. Who kidnapped him.