When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

What makes this number unique: 8,549,176,320?

Why is the Hole below a Lock?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

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?

Decode this picture on T-Shirt and tell what it says ?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.