Carcass wrote:
A casino uses chips in $5 and $7 denominations only. Which of the following amounts CANNOT be paid out using these chips?
(A) $31
(B) $29
(C) $26
(D) $23
(E) $21
Kudos for the right answer and explanation
We can quickly get the answer by eliminating four of the answer choices
(A) $31 = 2($5) + 3($7). ELIMINATE A
(B) $29 = 3($5) + 2($7). ELIMINATE B
(C) $26 = 1($5) + 3($7). ELIMINATE C
(D) $23 =
(E) $21 = 3($7). ELIMINATE E
Answer: D
Cheers,
Brent