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I thik that the missing word is 7

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The missing no is (d)15
We have 2nd,5th ,8th and 11th no in sequence i.e 2,3,4,5
similarly 3rd , 6th ,9th and 12th no. are 2, 2+3=5, 5+5=10, 10+7=17
Similarly 1st,4th,7th and 10th no.0,0+3=3,3+5=8, 8+7=15
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