What number comes next in the series?

5 15 5 18 5 24 14 20 _

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

If Rajina's daughter is my daughter's mom, who am I to Rajina?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

What 5-letter word typed in all capital letters can be read the same upside down?