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

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?

John gave half of the apples he had plus one more to Jacob. He gave half of the remaining ones plus one more to James. Now, John was left with just one apple.

Can you find out how many did he have in the beginning?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum.

1) Suppose the lion is hungry, will he be able to eat up the tamer?
2) If yes, how long can the tamer survive?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

What breaks yet never falls, and what falls yet never breaks?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

What is the next number in the series?

15 29 56 108 208 ?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?