Replace the question mark with the correct number.

To attend world science seminar, A famous chemist from Mexico visit
London. In the lab, the scientist was killed and his six assistants were under suspicion of killing the chemist.
Name of six assistants: Austin, Wayne, Dege, Oscaru, Lingard, and Rojo.
He left a note "76-20-44 79-16-22-7"

A local detective Jack was called to solve the case,

After reading the note, Jack instantly asked the police to arrest the murderers.

Who are the murderers?

What is the riddle which can be asked all day with a different correct answer each time.

What is full of holes but still holds water?

Solve the counting riddle by identifying the number of triangles in the given picture.

Can you solve the below geography rebus by decoding the below rebus ?

While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

What can you deduce from the following BrainBat?

CRY
LMKI

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C