What is the next number in this matchsticks series riddle?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

Which point will the car reach to go out?

What does this mathematical rebus means ?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

Find the 8 in the below-given Image.

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

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

In a town, there are four houses located at different distances from each other. Following are the distances:

The third house is 60 meters apart from the first house.
The fourth house is 40 meters apart from the second house.
The third house is 10 meters nearer to the fourth house than it is to the second house.

Can you find out the distance between the fourth and the first house?