Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

What is the next number in this series?

4,12,84,3612....

Replace the question mark with the correct number in below Picture:

Rectify the following equality 101 - 102 = 1 by moving just one digit.

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

Why is a river so rich ?

John was visiting his friend Jacob. He found out that his friend's wife had just killed a burglar in self-defense.
John asks Jacob about what happened and he told that "His wife was watching television when suddenly the bell rang. She thought that it is her husband Jacob but she found the burglar who attacked her instantly and she got so frightened that she killed the burglar immediately with the knife.
John asked the police to arrest his friend's wife. Why?

What does this rebus mean?

O
N
C
E
TIME

Can you identify if it's a murder or a suicide ?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.