Problem:
If A∗B means 2A+B​, then (3∗5)∗8 is
Answer Choices:
A. 6
B. 8
C. 12
D. 16
E. 30
Solution:
(3∗5)∗8=(23+5​)∗8=4∗8=24+8​=6.
Answer: A​.
The problems on this page are the property of the MAA's American Mathematics Competitions