A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

The sum of a mother, her baby and her dog's weight is 170 Kg. How much does the baby weigh if the mother weighs 100 kg more than the combined weight of the baby and the dog, and the dog weighs 60 per cent less than the baby?

Count the number of lines in the image below ?

Can you count the number of lines in the below picture?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

What is the coolest letter in the alphabet?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?