Can you solve the below tricky visual equation?

What is the next number in this series?

4,12,84,3612....

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

What is the fastest way to double your money?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

Why is the longest human nose just 11 inches?

Complete the given grid with valid words. You can only use the letters AAEEIIMMPPTT.

Hint: The grid reads the same across as down.

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Six people park their car in an underground parking of a store. The store has six floors in all. Each one of them goes to a different floor. Simon stays in the lift for the longest. Sia gets out before Peter but after Tracy. The first one to get out is Harold. Debra leaves after Tracy who gets out on the third floor.

Can you find out who leaves the lift on which floor?