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next. In the alternating series, 5 is subtracted from each number to arrive at the next.
Answer. a
10. 72, 76, 73, 77, 74, ?, 75, . . .
a. 70
b. 71
c. 75
d. 78
Solution. This series alternates the addition of 4 with the subtraction of 3.
Answer. d
Test Answer
1. (b) 2. (b) 3. (c) 4. (d) 5. (b) 6. (b) 7. (d) 8. (b) 9. (a) 10. (d)