Can you solve the maths in the below-given picture equation?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

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

A blonde put eyeliner on her head. Why?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

What number do you get when you multiply all of the numbers on a telephone's number pad?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

An American nightclub called 'The Coconut Grove' had a terrible fire in which over 400 people died. A simple design flaw in the building led to a high death toll. Subsequently, regulations were changed to ensure that all public buildings throughout the country eliminated this one detail, which proved deadly. What was it?