Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Replace the question mark with the number below given a simple math problem.

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

Can you find out who is the kidnapper in below Picture and why, Explain ?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

There is a shop where written:
Buy 1 for $1
10 for $2
100 for $3
I needed 999 and still only paid $3. How could this be financially viable for the shop-keeper?

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

Which is the smallest number that you can write using all the vowels exactly once?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?