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Nairaland Forum / Nairaland / General / Education / How To Multiply A Number By 25 Fast? Simplification Shortcuts With Examples (450 Views)
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How To Multiply A Number By 25 Fast? Simplification Shortcuts With Examples by Smartkeeda: 2:38pm On Aug 06, 2016 |
How to multiply a number by 25 fast: We know that we can write 25 as 100/4. So the trick is to divide the number by 4 and place 1. '00' at ten's place and unit's place if the number is completely divisible by 4. 2. '25' at ten's place and unit's place if we get 1 as remainder. 3. '50' at ten's place and unit's place if we get 2 as remainder. 4. '75' at ten's place and unit's place if we get 3 as remainder. Example 1: Multiply 124 into 25 Step 1: Divide 124 by 4 = 31 Step 2: Place '00' in the end, we get 3100 Example 2: Multiply 633 into 25 Step 1: Divide 633 by 4 = 158 with 1 as remainder. Step 2: Place '25' in the end, we get 15825 We hope it helps. You can get more such simplification tricks on http://www.smartkeeda.com/Quantitative_Aptitude/Arithmetic/Simplification/newest/all/ 1 Like |
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