What brings you down but never up?

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?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

What is the word or phrase?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

How many words can a pen with half refill write?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?