What is the next number in the arithmetic sequence: 4, 11, 18, 25, 32, ___?
Answer and explanation
Correct answer: B. 39
- Step 1: Find the common difference: 11 - 4 = 7; 18 - 11 = 7; 25 - 18 = 7; 32 - 25 = 7. Step 2. Add 7 to the last term: 32 + 7 = 39. Answer: 39, adding the constant difference of +7 to the preceding term 32. Why not the others: 38 adds 6; 40 adds 8.
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