Calculate A*B-C+D
Look at the series (10, 19, 36, D, C, A, 520, 1033, 2058, 4107, B, 16397, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A*B-C+D!Correct answers: 30
The first user who solved this task is Nasrin 24 T.
#brainteasers #math

A close shave
A man enters a barber shop for a shave.
While the barber is foaming him up, he mentions the problem he has getting a close shave around his cheeks.
"I have just the thing," says the barber taking a small wooden ball from a nearby drawer. "Just place this between your cheek and gum."
The client places the ball in his mouth and proceeds with the closest shave the man has ever experienced.
After a few strokes, the client asks in garbled speech "And what if I swallow it?"
"No problem" says the barber. "Just bring it back tomorrow like everyone else does!"