Question
8 6 2 ? -1
9.5 What should come in place of question mark (?) in the following number series?Solution
8 × 0.5 + 2 = 6 6 × 1 - 4 = 2 2 × 0.5 + 6 = 7 7 × 1 - 8 = - 1 - 1 × 0.5 + 10 = 9.5
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