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1. If the 1st number ina deries of consecutive odd numbers is 8 less than the last number in the series, how many numbers are there in the series?
- A. 7
- B. 7
- C. 7
- D. 7
Answer: Option D
Explanation:
find out how many numbers there are in the series, we subtract the first number from the last (15 - 7 = 8), divide the result by the step size (8 / 2 = 4), and then add 1 to account for the first number that we started with. Therefore, there are 5 numbers in this series.
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