1 / 10

Calculator Tricks 3

Calculator Tricks 3. By Brian Carruthers (Please see notes on slide 1). The answer will always be 37. Think of a four-digit number and enter it twice into your calculator. For example: 12341234. I think that the number you have chosen. is divisible by 137. Don’t you believe me?.

trevor-curtis
Download Presentation

Calculator Tricks 3

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Calculator Tricks 3 By Brian Carruthers (Please see notes on slide 1)

  2. The answer will always be 37 • Think of a four-digit number and enter it twice into your calculator. • For example: 12341234

  3. I think that the number you have chosen is divisible by 137

  4. Don’t you believe me? Why don’t you check this on your calculator?

  5. Now divide your eight-digit number by your original four-digit number

  6. Guess what? The answer is 73

  7. How did I know?

  8. Watch This: • Entering a four-digit number twice (12341234) is the same as multiplying it by 10001. • (1234 x 10001 = 12341234).

  9. Because 10001 = 73 x 137: • the eight-digit number will be divisible by 73, 137, and your original four-digit number.

  10. What did you think of that? Isn’t Maths amazing?

More Related