The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

Can you find the six hidden animals in the picture below?

No matter how little or how much you use me, you change me every month. What am I?

I have branches, but no fruit, trunk or leaves. What am I?

John was piloting a plane behind a car but was never able to overtake it. Why?

Find the next number in the sequence

5 12 24 36 ?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?

John needs to purchase 100 chocolates from three different shops and he has exactly 100 rupees to do that which he must spend entirely. He must buy at least 1 Chocolate from each shop.

The first shop is selling each chocolate at 5 paise, the second is selling at 1 rupee and the third is selling at 5 rupees.

How many chocolates should he buy from each shop?