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?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

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

Can you divide the below-given shape into four equal and identical pieces?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

0 0 0 = 6
1 1 1 = 6
2 2 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

You can use any mathematical symbols in the space provided to make all above algebraic expressions true.

A number with an interesting property:

When I divide it by 2, the remainder is 1.
When I divide it by 3, the remainder is 2.
When I divide it by 4, the remainder is 3.
When I divide it by 5, the remainder is 4.
When I divide it by 6, the remainder is 5.
When I divide it by 7, the remainder is 6.
When I divide it by 8, the remainder is 7.
When I divide it by 9, the remainder is 8.
When I divide it by 10, the remainder is 9.

It's not a small number, but it's not really big, either.
When I looked for a smaller number with this property I couldn't find one.

Can you find it?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

Why do Chinese men eat more rice than Japanese men do ?

How can a man go eight days without sleep?