Answer:
36
Explanation:
Find the rule for the sequence.
The change from 1 to 3 is +2.
The change from 3 to 6 is +3.
The change from 6 to 10 is + 4.
The change from 10 to 15 is + 5
Essentially, you are adding 1 and then adding it to the current number. The next 3 numbers are:
Change of +6: 15 + 6 = 21
Change of +7: 21 + 7 = 28
Change of +8: 28 + 8 = 36
36 is your 8th term.
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