24. Find the missing number 1, 3, 3, 6,
7, 9, 7, 12, 21
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Answer:
Step-by-step explanation:
3 odd numbers shud be skipped that is,15,17 and 19. So 21 must come and if u see in the question, 21 is there. So this sequence might be right, this is how I am guessing 13 is the answer.
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