Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

How can a man go eight days without sleep?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one?

5 $ 4 $ 3 $ 9 = 4215
6 $ 9 $ 2 $ 6 = 3816
4 $ 7 $ 3 $ 3 = 1122
7 $ 2 $ 7 $ 4 = ____

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

There are seven sisters in a house in a village where there is no electricity or any gadget.

Sister-1: Reading Novel
Sister-2: Cooking
Sister-3: Playing Chess
Sister-4: Playing Sudoku
Sister-5: Washing clothes
Sister-6: Gardening

what is Sister-7 doing ?

A father is locked up in jail. His wife has gone bankrupt. Their male child has to sell his hotel in order to gain some money. Yet their girl child does not care and is quite happy.

How can someone be so rude?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?