What is the next number in this series?

4,12,84,3612....

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

A man is walking down a road with a basket of eggs. As he
is walking he meets someone who buys one-half of his eggs
plus one-half of an egg.
He walks a little further and meets another person who buys
one-half of his eggs plus one-half of an egg.
After proceeding further he meets another person who buys
one-half of his eggs plus one half an egg. At this point, he
has sold all of his eggs, and he never broke an egg.
How many eggs did the man have to start with?

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Replace the question mark with the correct number in below Picture:

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?