You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

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

How could a baby fall out of a twenty-story building onto the ground and live?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

Bay of Bengal is in which state?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

Can you arrange the six given marbles in a manner that each one of them is touching all four marbles of different colours?

There were two grandmothers and their two granddaughters.
There were two husbands and their two wives.
There were two fathers and their two daughters.
There were two mothers and their two sons.
There were two maidens and their two mothers.
There were two sisters and their two brothers.
Yet there are only six, who are buried here,
All are born legitimate and relationships clear.
How can this happen?

How can you tell a raw egg from a hard-boiled egg?