Which tank will fill first?

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

What demands an answer, but asks no questions

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

What kind of band never plays music?

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

What can go up a chimney down, but can’t go down a chimney up?

Tell me the Hindi name of a Vegetable which if we remove 1st word will become a precious Stone and by removing the last word it will become a sweet eatable.

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.

Solve the following series:
AZ, GT, MN, __, YB