How many ten-dollar bills are there in total across the four wallets?

• A. 5
• B. 7
• C. 6
• D. 8

Answer: (C)

To find how many ten-dollar bills are across the four wallets, you add up the number of tens in each wallet. Count how many ten-dollar bills are in the first wallet, add the count in the second, then the third, and the fourth, and combine all four counts. The total is the sum of those four amounts. If the counts in the wallets add up to six, then there are six ten-dollar bills in total. For example, one way the counts could work is 2, 0, 1, and 3 tens respectively, which sums to 6. The essential idea is simply adding all the tens from each wallet to get the total.