Guest Posted April 9, 2009 Report Share Posted April 9, 2009 The following are true: 126/21=6 153/51=3 688/8=86 You can check all those on your calculator. But this is false: 270/27=10 What's the rule? Quote Link to comment Share on other sites More sharing options...
0 DudleyDude Posted April 9, 2009 Report Share Posted April 9, 2009 Not sure how to phrase it using math so I'll try using just English. In addition to being true equations, the digits to the left of the slash must be the same as the digits to the right. This is true for the 3 example equations but the false equation has a '1' to the right of the slash that isn't on the left side. Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 9, 2009 Report Share Posted April 9, 2009 As Dudley was saying, the answer must contain numbers which are part of the numerator. Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 9, 2009 Report Share Posted April 9, 2009 The following are true: 126/21=6 153/51=3 688/8=86 You can check all those on your calculator. But this is false: 270/27=10 What's the rule? well if you remove the equal sign, the digits on both sides of the divide sign must be the same. for example in the first one there is 126 and 216. The second one has 153 and 513...third has 688 and 886. However the false one has an extra "1". So its comparing 270 and 2710 which is false. Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 9, 2009 Report Share Posted April 9, 2009 The divisibility rule of 9. 2+7=9 2+7+0=9, so the answer should be divisible by 9 but it is not? I'm not sure if I explained that properly. Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 9, 2009 Report Share Posted April 9, 2009 well if you remove the equal sign, the digits on both sides of the divide sign must be the same. for example in the first one there is 126 and 216. The second one has 153 and 513...third has 688 and 886. However the false one has an extra "1". So its comparing 270 and 2710 which is false. Ah... much better explanation Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 9, 2009 Report Share Posted April 9, 2009 The divisibility rule of 9. 2+7=9 2+7+0=9, so the answer should be divisible by 9 but it is not? I'm not sure if I explained that properly. just figured out the right answer, dismiss my answer from above lol. Is it time to get off work yet? Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 9, 2009 Report Share Posted April 9, 2009 I'm sure these guys explained it better but I'm just going to give the correct pattern for the last one 270/7=20 Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 9, 2009 Report Share Posted April 9, 2009 x/y = z. The numbers that are used in x must be = the numbers that are used in y and z. Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 9, 2009 Report Share Posted April 9, 2009 The following are true: 126/21=6 153/51=3 688/8=86 You can check all those on your calculator. But this is false: 270/27=10 What's the rule? The dividend and the divisor, when combined, must equal the quotient/ contain the same digits as the quotient. 10 has an extra 1 Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 10, 2009 Report Share Posted April 10, 2009 i think it is 270/72=0 or 270/0=72 the answer doest found on calculator logic? may be Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 10, 2009 Report Share Posted April 10, 2009 Well just my version of mirroring rule: Mirrors 126/'6'21= missing here is 6 153/'3'51= missing here is 3 688/8'86'= missing here is 86 So 270/2710 or 270/1027 are not mirror of 270/072. Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 10, 2009 Report Share Posted April 10, 2009 126/21 = 6 (1+2+6)-(2+1)=6 153/51 = 3 (1+5+3)-(5+1)=3 (6+8+8)-(8)=8+6 BUT: (2+7+0)-(2+7) does not equal (1+0). Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 10, 2009 Report Share Posted April 10, 2009 I'm sure these guys explained it better but I'm just going to give the correct pattern for the last one 270/7=20 No one gave a full explanation; Docta92 is the only one who solved it correctly. Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 10, 2009 Report Share Posted April 10, 2009 No one gave a full explanation; Docta92 is the only one who solved it correctly. Actually, the OP never asked for a solution to the equation. It asked for the rule. "270/7=20", though following the same pattern as the 3 examples, it deviates from the original examples in that they were actually true equations as well as following a pattern. So what is the rule? Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 11, 2009 Report Share Posted April 11, 2009 (edited) The following are true: 126/21=6 153/51=3 688/8=86 You can check all those on your calculator. But this is false: 270/27=10 What's the rule? The equation must be mathematically correct, and the digits must balance in any order on either side of the slash. Edited April 11, 2009 by Phatfingers Quote Link to comment Share on other sites More sharing options...
0 Guest Posted April 11, 2009 Report Share Posted April 11, 2009 looks to me like we're dealing with sets: {1,2,6}\{2,1}={6} {1,5,3}\{5,1}={3} and so: {2,7,0}\{2,7}={0} Quote Link to comment Share on other sites More sharing options...
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Guest
The following are true:
126/21=6
153/51=3
688/8=86
You can check all those on your calculator.
But this is false:
270/27=10
What's the rule?
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