Can you place six X (crosses) in below board without making three in a row in any way ?

John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

10+10 and 11+11 can give you the same answer.

Explain how?

Can you decipher the below rebus?

PBLUESAISNUERSES

I travel all around the world but always stay in the corner. What am I?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=