Find the number of squares in the below picture

Can you find out the missing number in the grid?

What's a single-digit number with no value?

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

Complete the given grid with valid words. You can only use the letters AAEEIIMMPPTT.

Hint: The grid reads the same across as down.

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

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

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

A crime was committed at baker street. Ibrahim Dakota who was shot in the stomach was the main suspect. Sherlock questioned the suspect. The conversation started as:
Sherlock: What's your story, Ibrahim?
Ibrahim: I was walking around baker street and suddenly a man from the back shot me. I ran as fast as I could to save my life".
Sherlock: That is enough (and ask the police to arrest him).

Why does Sherlock think he is the murderer?