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

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

Replace the question mark with the correct number.

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?

What is so fragile that saying its name breaks it?

If eleven plus two equals one, what does nine plus five equal?

There are five men, let's say Tarun Harish Lavesh, Manoj, and Manish. All of them have a dot mark on their forehead. They can't see the dots on their forehead but can see the ones on others. The owner of WHITE Dot is an honest person and will never lie, while the owner of BLACK Dot always tells the lie.

This is the statement from Tarun Harish Lavesh and Manish:
Tarun: 'I see 3 whites and 1 black'
Harish: 'I see 4 black'
Lavesh: 'I see 3 black and 1 white'
Manish: 'I see 4 white'

What colour is the dot on each of Tarun Harish Lavesh, Manoj, and Manish's forehead?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

Which English verb becomes past tense just by rearranging the letters?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?