Question: What is the product of the base-5 numbers 23 and 14 in base-10?

Options:

1. 66
2. 70
3. 72
4. 74

Correct Answer: 70

Solution:

Convert 23 (base-5) to decimal: 2*5^1 + 3*5^0 = 10 + 3 = 13. Convert 14 (base-5) to decimal: 1*5^1 + 4*5^0 = 5 + 4 = 9. The product is 13 * 9 = 117.