What does this rebus riddle means ?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

There was a blind beggar living on the footpath of a street. Suddenly one day, the beggar's brother died. What was the relation of the blind beggar with the person who died?

PS: Brother is not the answer.

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

What can you hold in your right hand, but never in your left hand?

When it is alive we sing, when it is dead we clap our hands. What is it?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?