John is the son of Jacob.
So,
Jacob is the_____of John's father?

Why is a river so rich ?

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

Can you fill the blank with the correct number?

6 30 870 756030 _____

Solve this riddle by finding the odd one out from the rest.

Find the missing number in the series below

13 -21 34 -55 ? -144

As you can see in the picture, you have a hole with dimensions 9 ft x 2 ft Also available is a wooden board with dimensions 6 ft x 3 ft Now you have to cover the hole with this board and you are allowed to cut the board into two pieces. Please see that the hole is completely covered and the boards should not overlap or extend beyond the edge. How will you cut the board?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

What has hands, but can’t clap?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?