If 66 # 4 = 12.4 and 12 # 82 = -14, then what is the value of 81 # 14?
Show answer & explanation
Correct answer: C
Explanation
Just as
66 # 4 = 12.4
(66 − 4) / 5 = 62 / 5 = 12.4
And
12 # 82 = -14
(12 − 82) / 5 = -70 / 5 = -14
Similarly, 81 ÷ 14
(81 − 14) / 5
= 67 / 5
= 13.4