In the wallet with 3 twenties, 1 ten, 2 fives and 1 one, how many bills are there in total?

• A. 8
• B. 9
• C. 7
• D. 10

Answer: (C)

Counting how many items are present by adding them up is the idea here. In the wallet, there are 3 bills of twenty, 1 of ten, 2 of five, and 1 of one. Add these counts: 3 + 1 + 2 + 1 = 7. So there are seven bills in total. Remember, the values of the bills don’t affect the count; if you summed the money instead (3×20 + 1×10 + 2×5 + 1×1), you’d get 81 dollars, which is not asked.