The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

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

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

What does this mathematical rebus means ?

I have an eye but still cannot see.

Who am I?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Can you solve the maths in the below-given picture equation?