Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

What has one eye, but can’t see?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

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 ?

I have Rs.50 and I spend it in the way as below.

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

A rain drop fell from one leaf to another leaf and lost 1/4th of its volume. It then fell to another leaf and lost 1/5th of the volume. It again fell on another leaf and lost 1/5th of the volume.



This process kept repeating till it fell on the last leaf losing 1/75th of its volume.



Can you calculate the total percentage of loss from the initial volume when the drop has fallen to the last leaf accurate up to two decimal places?

Seven Robbers robbed a bank and hide the coins in a lonely place.
They decide to divide the money equally the next morning. Two greedy robbers decided to cheat the others and reach the place at night. They equally divided the coins between them, one coin left. So they called another robber and then they decided to divide equally among the three. Sadly again one coin left. The same thing happened to the 4th 5th and the 6th robber.
However, when the 7th robber reached in the morning, they can divide the coins equally.

How many coins were there in total?

People make me, save me, change me, raise me. What am I?