Find the next number in the sequence

5 12 24 36 ?

You need to arrange three 7 and mathematical symbols to form number 1?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Jack was having a candle light dinner with his girlfriend. Suddenly a cold gush of wind entered through the open window and three of the ten candles were extinguished. Assuming that none of the other candles were extinguished.

How many candles are they left with in the end ?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

Why do you find that most of the buildings are deprived of the 13th floor?