Can you replace the question mark with the correct number?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

John went to buy some expensive, foreign chocolates. He only had Rs 100 with him. When he reached the shop, he got out and know that on those chocolates, there was a 15% import duty and 5% VAT.

How much worth chocolate should he buy so that he can accommodate it in Rs 100?

Rumel, A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note:

710 57735 34 5508 51 7718

Currently, there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?

Solve the riddle below:

If a Chicken says, 'All chickens are liars" is the chicken telling the truth?

I have a sore throat and a severe headache. I have four tablets with me that are identical to each other and they do not have any cover on them. There is no way I can identify which tablet serves what purpose. The only thing that I know is that two of these four tablets are for the throat and the remaining two are for the headache. To treat my condition, I must take 1 of each. What will I do now?

What does below chemistry rebus means?

Out of the nine cats that you can see in the picture, there are only two that are completely identical. Can you find them out?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?