A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

Keyboard words are not in alphabetical order, Why?

What demands an answer, but asks no questions

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

Out of four images which one is the odd one out?

I am an eight letter word and I am a computer terminology.
The second, third and fourth letters make an animal.
The fourth, fifth, sixth, seventh and eighth letters make a weapon.
The first, second, third and fourth letters can be taken as an outcome of any exam.
The fifth, sixth, seventh and eighth letter combine to form a high end typing software.

Can you tell who am I ?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

What has a bottom at the top?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10