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

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

They are three errirs in this question. Can you find them?

Can you count the number of blocks in the picture below?

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

How is the moon similar to a dollar?

In a secret society, a buried chamber can be accessed only via a secret password. The password is seven characters long and comprises of just letters and numbers.

You find a code that can help you in cracking the password. The code says "You force heaven to be empty".

Can you deduce the password from that?