13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

Which alphabet is a part of our body?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

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

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

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?

Solve this riddle by finding the odd one out from the rest.