What Comes in Place of "?" mark ?

What Comes in Place of "?" mark.

? T T F F

S S E N T

E T T F F

S S E N T

Answer is not "E"

100 people standing in a circle in an order 1 to 100

100 people standing in a circle in an order 1 to 100. No.1 has a sword. He kills next person (i.e.no. 2 )and gives sword to next to next (i.e no.3). All person does the same until only 1 survives. Which number survives at the last?

Deductive Math Problem

There is a non vegetarian restaurant which sells chicken pieces in orders of 6, 9 and 20. Calculate the maximum number of chicken pieces you cannot order from that restaurant ?

Classic Logic Puzzle

If the puzzle you solved before you solved the puzzle you solved after you solved the puzzle you solved before you solved this one, was harder than the puzzle you solved after you solved the puzzle you solved before you solved this one, was the puzzle you solved before you solved this one harder than this one?

Sherlock Holmes Riddles

Sherlock breaks into a crime scene. The victim is the owner who is
slumped dead on a chair and have a bullet hole in his head. A gun lies on the floor and a cassette recorder is found on the table.
On pressing the play button, Sherlock hears the message
'I have committed sins in my life and now I offer my soul to the
great lord'....following a gunshot.
Sherlock smiles Of-course its a murder.

Why did he think so?

English word with all vowels

What English word contains all the vowels a-e-i-o-u in alphabetical order ?

Month Puzzle - Decode the number

Here is a list showing the month and a number for each

january = 73
February = 83
March = 51
April = 52
May = 31
June = 42
July = 41
August = 63

Decipher the logic and find the number for September = ?