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?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

What does this simple rebus mean?

I got a bee but no honey.
got an eye but am still blind.
got a sea but no water.
got a tea but no coffee.
got a why but no answer.

What Am I?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

They are three errirs in this question. Can you find them?