John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

Can you find out the remainder when 3^300 is divided by 5?

Replace the question mark with the number below given a simple math problem.

Consider this: Arnold Schwarzenegger has a big one. Michael J. Fox has a small one. Prince doesn’t have one. The Pope has one but never uses it. Bill Clinton has one and uses it all the time. What is it?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

Can you count the number of lines in the below picture?