What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Replace the question mark in the picture below.

Which country gets ill every time?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

what does the below rebus means?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

What breaks yet never falls, and what falls yet never breaks?