Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

I have eight fingers and two thumbs but I do not live. What Am I?

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

Chhote se Chintu Miyan,
Lambi si Pooch.
Jahan Jaye Chintu Miyan,
Wahan Jaye Pooch.

छोटे से चींटू मियाँ,
लंबी सी पूंछ।
जहाँ जाये चींटू मियाँ,
वहाँ जाये पूंछ।

Bolo kya?

I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I?

Find the next number in the sequence

5 12 24 36 ?

What's the only room from which no one can enter or leave

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

What is the riddle which can be asked all day with a different correct answer each time.