I have an apple tree , number of apple in this tree get doubles every week.

On 30th week , the tree gets completely filled with apples :-)



Can you tell me , on what week does my tree is half covered with apples ?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

Find the 8 in the below-given Image.

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

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

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?

What is the next number in this series?

4,12,84,3612....

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

What has no start, end, or centre?