If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

What has many keys but can’t open a single lock?

I am the fastest animal but cannot climb the tree. What am I?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

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

What does the below image rebus riddle means ?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?