Why is a river so rich ?

You need to arrange three 7 and mathematical symbols to form number 1?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

John and his team plan to rob a safe. They got just one chance to break the code else the local police will be informed. Below are clues:
A) Exactly one number is perfectly placed: 9 8 1
B) Everything is incorrect: 9 2 4
C) Two numbers are part of the code of the safe but are wrongly placed: 0 9 3
D) One number is part of the code of the safe but is wrongly placed: 1 4 7
E) One number is part of the code of the safe but is wrongly placed: 7 8 3

What does a man do only once in his lifetime, but women do once a year after they are 29?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

what does this below rebus represent identXQQQQQME

Can you find a number that lies one third of the distance between 1/3 and 2/3?