What goes up but never comes down?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Steffi's daughter Jazelle needs to be picked up from school every day.
Steffi asks one of her colleagues to pick up Jazelle from the school. Steffi devised a password system to confirm that Jazelle goes with the correct colleague only.

The password on Monday was SJM16.
The password on Wednesday was TAW39.

What will the password be for Friday?

Can you find the odd one out from the below words ?

First Second Third Forth Fifth Sixth Seventh, Eighth Nine Ten Eleven Twelve.

Complete the table series riddle by finding the number that can replace "??".

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

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