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

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

Once while in his court, King Akbar asked Birbal to write something on a wall that makes one sad when read in good times and makes one happy when read in sad times.

He took only a few moment and wrote something that fit the requirements. What did he write?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

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

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?