Complete the series: 20, 21, 23, 26 30, 35, ______?
- 38
- 40
- 41
- 43
Explanation
Step 1: Find the differences between consecutive terms
-
21 − 20 = 1
-
23 − 21 = 2
-
26 − 23 = 3
-
30 − 26 = 4
-
35 − 30 = 5
So the differences increase by 1 each time: 1, 2, 3, 4, 5, …
Step 2: Find the next difference
-
Next difference = 6
Step 3: Find the next term
-
Next term = 35 + 6 = 41
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