Find the next number in the sequence

5 12 24 36 ?

Prove that the below maths equation is true.

8 + 8 = 91

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

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?

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

I’m tall when I’m young, and I’m short when I’m old. What am I?

The more you take me, the more you leave me behind.
Who Am I?

Can you replace the question mark with the correct number in the below table sequence?