Decode below rebus
D
N
A
T
S , D

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

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Can you divide the below-given shape into four equal and identical pieces?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

A man died and leaves Rs.10,000 in his will. There are 6 beneficiaries- his 3 sons and their wives. The 3 wives receive Rs.3960 of which Priyanka gets Rs.100 more than Tanu and Neha gets Rs.100 more than Priyanka.
Pramod gets twice as much as his wife, Tushar gets the same as his wife, and Prashant gets 50% more than his wife.

Who is married to whom?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

It spends most of its day eating white, but when it’s quick enough, it gets to eat fruit and sometimes some blue things. It’s in a dark room, where the walls are blue, it runs from a ghost that roams the halls and haunts it all the time. What is it?