The Answer is 40
Explanation:
cumulative sum
1=4=5
then 5 + 2+7=12
then 12+3+6=21
then 21+8+11=40
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cumulative sum
1=4=5
then 5 + 2+7=12
then 12+3+6=21
then 21+8+11=40
Thank you for visiting us, for more riddles click on our links below
Fun & Great Riddles our blog
Earn money by solving and sharing riddles our Facebook page
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