Why do we preferably have round manhole covers and not square ones?

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.

How can you make number one disappear by adding something to it?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

Can you find out who is the kidnapper in below Picture and why, Explain ?

What is the next number in this matchsticks series riddle?

A farmer and his neighbour once went to Emperor Akbar"s court with a complaint. "Your Majesty, I bought a well from him," said the farmer pointing to his neighbour, "and now he wants me to pay for the water."
"That"s right, your Majesty," said the neighbour. "I sold him the well but not the water!"?
The Emperor asked Birbal to settle the dispute. How did Birbal solve the dispute?

If six children and two dogs were under an umbrella, how come none of them got wet?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

Find the missing letter in the last circle logically in the given below picture.