I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

What is the word or phrase?

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

Which letter of the alphabet has the most water?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

What is next number in the pattern below:

131 517 192 123 ?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

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