CAT > Quantitative Aptitude (Quant) > Multiplication Trick: Multiply Two Numbers that are Just Below the Base
Multiplication Trick: Multiply Two Numbers that are Just Below the Base Video Lecture - Quantitative Aptitude (Quant)
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FAQs on Multiplication Trick: Multiply Two Numbers that are Just Below the Base Video Lecture - Quantitative Aptitude (Quant)
| 1. How does the multiplication trick work for numbers just below the base? |  |
Ans. The multiplication trick for numbers just below the base involves subtracting the base from each number and then adding the product of the differences to the base. For example, if the base is 10, and we want to multiply 9 with 8, we subtract 10 from each number (9-10 = -1 and 8-10 = -2) and then add the product of the differences to the base (10 + (-1) * (-2) = 12). Hence, the result of multiplying 9 with 8 is 12.
| 2. Can I use this multiplication trick for any base? | |
Ans. Yes, you can use this multiplication trick for any base. The trick works by subtracting the base from each number and then adding the product of the differences to the base. As long as you follow this process, you can apply the trick to any base.
| 3. What if one of the numbers is above the base? Can I still use this trick? | |
Ans. No, this multiplication trick is specifically designed for numbers that are just below the base. If one of the numbers is above the base, you cannot use this trick. The trick relies on subtracting the base from each number, which is not possible if one of the numbers is greater than the base.
| 4. How can I verify the accuracy of the multiplication trick? | |
Ans. To verify the accuracy of the multiplication trick, you can use the traditional method of multiplication. Multiply the two numbers using the standard method and compare the result with the result obtained using the multiplication trick. If both results match, then the multiplication trick has been applied correctly.
| 5. Can this multiplication trick be used for larger numbers? | |
Ans. Yes, this multiplication trick can be used for larger numbers as well. The trick works regardless of the size of the numbers as long as they are just below the base. You can apply the same process of subtracting the base from each number and adding the product of the differences to the base for larger numbers.
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179 videos|158 docs|113 tests
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Timeline
| 00:08 | Introduction |
| 00:45 | Identifying Base of Numbers |
| 01:14 | Multiplication Trick |
| 03:04 | Multiplication of Two-Digit Numbers |
| 04:22 | Multiplication of Four-Digit Numbers |
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