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Find the square of 89.1. 79712. 79213. 78814. 76415. 7791 |
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Answer» Correct Answer - Option 2 : 7921 Concept used: Calculation skills trick. Calculation: Step - 1 Write down the squares of each of the digits in two digit format i.e. 82 = 64 and 92 = 81 The number obtained after this step is 6481. Step – 2 Multiply the digits with each other and also with the power 2 i.e. 8 × 9 × 2 = 144 Step – 3 Add the number obtained in step - 1 with the number obtained in step – 2 keeping the unit place empty i.e. 6 4 8 1 1 4 4 _ 7 9 2 1 This is our final answer. |
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