I look at you, you look at me I raise my right, you raise your left. What am I?

What does this mathematical rebus means ?

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

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Two friends decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 MPH. They live 36 miles apart. One of them has a pet carrier pigeon and it starts flying the instant the friends start traveling. The pigeon flies back and forth at 18 MPH between the 2 friends until the friends meet.

How many miles does the pigeon travel?

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?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6