Question

If 4 # 2 = 10 and 6 # 3 = 21, what is 8 # 4?

• A. 36
• B. 40
• C. 44
• D. 48

Answer 1

Answer:

A. 36

From the given examples:

• (4 # 2 $= 4 \times 2 + 2 = 8 + 2 = 10)$

• (6 # 3 $= 6 \times 3 + 3 = 18 + 3 = 21)$

So the pattern is:

a # b$= a \times b + b = b(a+1)$

Now apply it to (8 # 4):

$8 \times 4 + 4 = 32 + 4 = 36$