What does this simple rebus mean?

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

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

Which Travels Faster? Solve below famous picture riddle:

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

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Solve the puzzle by telling what does below picture means.