What work can one never finish?

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 girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

Identify the hidden meaning behind this picture?

Can you guess the name of the month by looking the below rebus ?