A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

John is pretty weird. He likes toffees but hates chocolates. He loves books but never reads. He likes to build his troops in an online game but does not proceed with the war. He likes to go swimming but is afraid of water.

Seeking this behaviour, can you tell whether he likes balloons and parties?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Can you decipher the below rebus?

PBLUESAISNUERSES

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

1 dollar = 100 cent
= 10 cent x 10 cent
= 1/10 dollar x 1/10 dollar
= 1/100 dollar
= 1 cent

=> 1 dollar = 1 cent

solve this tricky problem?

In the image given, you can find several triangles. Can you count them all?

Count the number of triangles in the given picture.