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| Thread ID: 95362 | 2008-12-03 09:15:00 | Maths problem | bk T (215) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 725442 | 2008-12-03 09:15:00 | How do I solve this problem: Greg puts his pet cats in a box to take them to his auntie's house. How many cats are there in the box: a) If there were 21 more legs than tails? b) If there were 14 more legs than eyes? My daughter brought this home from school expecting me to help her out. But I can't solve it other than by trial and error. I know the answer is 7 for both the questions but don't really know how to show her the work out. Can some wise person here explain the ways to solve problems of this nature? |
bk T (215) | ||
| 725443 | 2008-12-03 09:18:00 | draw a picture. | Metla (12) | ||
| 725444 | 2008-12-03 09:22:00 | a) Knowing that a typical cat has a tail and four legs: 1T -> 4L (i.e. 1 Tail = 4 Legs) 2T -> 8L 3T -> 12L.... Now let's focus on the difference (which tells us how many more legs are there compared to the number of tails): 4L - 1T = 3 8 - 2 = 6 12 - 3 = 9 16 - 4 = 12 20 - 5 = 15 24 - 6 = 18 28 - 7 = 21 A difference of 21 indicates that there are 28 legs. 28 / 4 = 7 cats (My Theory) :) |
Renmoo (66) | ||
| 725445 | 2008-12-03 09:25:00 | a) Knowing that a typical cat has a tail and two legs: Pretty sure most typical cats have four legs ... edit: OK, so you worked that one out now and changed it. :p |
Jen (38) | ||
| 725446 | 2008-12-03 09:26:00 | The missing legs were served as an entrée. | Metla (12) | ||
| 725447 | 2008-12-03 09:29:00 | b) Same strategy as above. A cat has four legs and two eyes: 2E -> 4L 4E -> 8L Let's focus on the difference now: 4L - 2E = 2 8 - 4 = 4 12 - 6 = 6 16 - 8 = 8 20 - 10 = 10 24 - 12 = 12 28 - 14 = 14 A difference of 14 indicates there are 28 legs in total. Divide 28 by four and you will get seven. There are seven cats in total. |
Renmoo (66) | ||
| 725448 | 2008-12-03 09:42:00 | Thanks. Jamuz. I'm convinced with your answers. I can now explain it to my daughter.:thanks |
bk T (215) | ||
| 725449 | 2008-12-03 10:03:00 | The missing legs were served as an entrée. :lol: |
qazwsxokmijn (102) | ||
| 725450 | 2008-12-03 10:21:00 | They were cat-ipillars? | rob_on_guitar (4196) | ||
| 725451 | 2008-12-03 10:33:00 | I think the real question is: How do you get 7 cats into a box? | --Wolf-- (128) | ||
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