Guest
Text Details
|
Here 49^3=(48*49*50)+(1^2*49). We can solve 48*49 by the factoring method, but for this sort of problem, I prefer to use the close-together method. Using that method, we get 48*49=(50*47)+(1*2)=2352. Multiplying this by 50, we get 117,600, and therefore: 49^3=117,600+49=117,649.
—
Secrets of Mental Math: The Mathemagician's Guide to Lightning Calculation and Amazing Math Tricks
(book)
by Arthur Benjamin and Michael Shermer
|
| Language: | English |
| Submitted by: | Deroche1 |
This text has been typed
166 times:
| Avg. speed: | 85 WPM |
|---|---|
| Avg. accuracy: | 97.3% |
Top 10 scores for this text
| User | Speed | Accuracy | Points | Place | Date | |
|---|---|---|---|---|---|---|
| 1 | joshua728 | 164 WPM | 99.3% | 106 | 1/2 | Oct 5, 2024 |
| 2 | sahibprime | 159 WPM | 99.6% | 104 | 1/2 | Jan 16, 2024 |
| 3 | helloimnotgood1 | 156 WPM | 98.3% | 101 | 1/2 | Oct 5, 2024 |
| 4 | deroche1 | 147 WPM | 99.3% | 96 | 1/2 | May 15, 2025 |
| 5 | poke1 | 139 WPM | 99.6% | 90 | 1/2 | Jun 7, 2024 |
| 6 | landarian | 124 WPM | 100% | 81 | 1/2 | May 15, 2025 |
| 7 | mth_quitless | 120 WPM | 98.7% | 78 | 1/2 | Jun 6, 2024 |
| 8 | zak389 | 110 WPM | 99.3% | 72 | 1/2 | Jun 6, 2024 |
| 9 | clergy | 109 WPM | 99% | 71 | 1/2 | Jul 30, 2024 |
| 10 | keegant | 101 WPM | 97.6% | 66 | 1/2 | Feb 4, 2024 |