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?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Two trains start at the same time, one from Bangalore to Mysore and the other from Mysore to Bangalore. if they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

Do You See It?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

Why is the Hole below a Lock?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?