Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

A rain drop fell from one leaf to another leaf and lost 1/4th of its volume. It then fell to another leaf and lost 1/5th of the volume. It again fell on another leaf and lost 1/5th of the volume.



This process kept repeating till it fell on the last leaf losing 1/75th of its volume.



Can you calculate the total percentage of loss from the initial volume when the drop has fallen to the last leaf accurate up to two decimal places?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

Imagine you are in a room with no windows or doors. How will you get out?