# Calculate A*B-C-D

Look at the series (5, A, C, 43, 73, 115, 171, D, 333, 443, 575, B, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A*B-C-D!Correct answers:

**18**The first user who solved this task is

**Nílton Corrêa de Sousa**.#brainteasers #math

### Pilot: Have you ever flown in ...

Pilot: Have you ever flown in a small plane before?

Passenger: No, I have not.

Pilot: Well, here is some chewing gum. It will help to keep your ears from popping.

Pilot (after the plane landed): Did the gum help?

Passenger: Yep. It worked fine. The only trouble is I cant get the gum out of my ears.

Passenger: No, I have not.

Pilot: Well, here is some chewing gum. It will help to keep your ears from popping.

Pilot (after the plane landed): Did the gum help?

Passenger: Yep. It worked fine. The only trouble is I cant get the gum out of my ears.