I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

Find the next number in the series below

21 32 54 87 131 ?

Identify the hidden meaning behind this picture?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Identify the 10 differences between the two given pictures.

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

A non-stop marathon is the shared favourite sport of three brothers.

*The oldest one is fat and short and trudges slowly on.
*The middle brother's tall and slim and keeps a steady pace.
*The youngest runs just like the wind, speeding through the race.

"He is young in years, we let him run!" the other two brothers explained, "'because though he is surely number one, he is second, in a way." Why is it?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?