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I think that 15 is too small, 30 is too big, so 28 is my estimate.
I that 10 is to big and 2 is to small I estimate 6.
Too big is 10 and too small is 2 my estimate is 4
90 is to big and 5 is to small and my estimate is 30.
I think 2 is too small and 8 is too big my estimate is 4.