Answer
The next number in the sequence is 21.
Work Step by Step
Starting with the first value, the difference between each number in the sequence increases by 1, i.e. 6+7=7, 7+2=9, 9+3=12, 12+4=16, 16+5=21.
Basic College Mathematics (9th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0321825535
ISBN 13:
978-0-32182-553-7
Appendix: Inductive and Deductive Reasoning - Appendix Exercises - Page A-5: 10
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