complete the series 1,3,7,13,21...?
Answers
Answered by
1
Answer:
1,3,7,13,21,31,43,57,73,....
Explanation:
the difference between the 1st 2 elements is 2 this difference then increases by 2 with the increase in number of elements
Answered by
0
31 is the correct answer
Because 1 plus 2 is 3.
3 plus 4 is 7
7 plus 6 is 13
Everything time the number added is two more than the previous one...
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