How is the moon similar to a dollar?

A farmer went to a market and bought a wolf, a goat, and a cabbage. On his way home, the farmer came to the bank of a river and rented a boat. But crossing the river by boat, the farmer could carry only himself and a single one of his purchases: the wolf, the goat, or the cabbage. If left unattended together, the wolf would eat the goat, or the goat would eat the cabbage. The farmer’s challenge was to carry himself and his purchases to the far bank of the river, leaving each purchase intact. How did he do it?

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

If two's company, and three's a crowd, then whats four and five ?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

In the picture given below, can you find out which digit will take place of the question mark?

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?