Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Find the next number in the series below

21 32 54 87 131 ?

Who is that with a neck and no head, two arms and no hands? What is it?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Count the number of triangles in the below picture?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

What is black when you buy it, red when you use it, and gray when you throw it away?

A charming young lady was approached by a kind looking old woman in a restaurant. The old woman said to her, 'You look exactly like my younger daughter. Sadly she passed away a couple of months back. Could you do me a favor and say 'Goodbye, mother' with a kind smile on your face when I leave?

The young lady agreed for the same and said, 'Goodbye, mother' when the old woman left. Soon after, she got the most disengaging shock of her life.

Can you guess what the shock was?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

I am the fastest animal but cannot climb the tree. What am I?