There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

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

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Find the 8 in the below-given Image.