Question
12 Â Â Â 11 Â Â Â Â 21 Â Â Â Â 62 Â Â Â Â ?
     1234 What will come in place of (?) in the following questions?Solution
12 × 1 - 1 = 11 11 × 2 - 1 = 21 21 × 3 - 1 = 62 62 × 4 - 1 = 247 247 × 5 - 1 = 1234
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