Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

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

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

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

Can you find the thief by just looking at the picture below?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

You are on your way to visit your Friend, who lives at the end of the hill. It is his birthday, and you want to give him the cakes you have made. Between your house and his house, you have to cross 5 bridges, and as it goes in the land of make believe, there is a troll under every bridge! Each troll, quite rightly, insists that you pay a troll toll. Before you can cross their bridge, you have to give them half of the cakes you are carrying, but as they are kind trolls, they each give you back a single cake. How many cakes do you have to leave home to make sure that you arrive at a friend's house with exactly two

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?