Replace the question mark with the correct number in the below-given picture?

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.

What is the next number in this series?

4,12,84,3612....

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

What can you deduce from the following BrainBat?

CRY
LMKI

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

Why do we preferably have round manhole covers and not square ones?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

How can you take 2 from 5 and leave 4?

No matter how little or how much you use me, you change me every month. What am I?