Find the next number in the series.
1 10 24 43 67 ?

What can you see in the middle of March and April that you can never see in any other month?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

Can you find the dog hidden in a group of pandas?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Speaking of rivers, a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

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