Brain teaser
Mar 6, 2022 14:22:35 #
Mar 6, 2022 14:25:51 #
dgrimsman
Loc: Sisters, Oregon
Paradise Pirate wrote:
15
first number times second number plus the addition of the 1st & 2nd numbers
7 x 1 = 7 + 7 + 1 = 15
first number times second number plus the addition of the 1st & 2nd numbers
7 x 1 = 7 + 7 + 1 = 15
Yep, my head feels better now!
Thanks
Mar 6, 2022 14:55:11 #
jayluber
Loc: Phoenix, AZ
7 + 7 +1 is really not the rule for 71. It just happens to work because of the 1 in 71. but def not the rule.
Mar 6, 2022 14:56:10 #
Mar 6, 2022 15:03:02 #
Mar 6, 2022 15:15:04 #
jayluber wrote:
7 + 7 +1 is really not the rule for 71. It just happens to work because of the 1 in 71. but def not the rule.
What Paradise Pirate wrote was:
(7x1) + (7+1) = 15
Or, the sum of the two numbers multiplied by each other, and the two numbers added together.
This is the rule, and works for any of the values in the original puzzle, and is the CORRECT ANSWER.
Once again, congratulations, Paradise Pirate, for being the first to get it correct AND provide the explanation.
Mar 6, 2022 15:16:43 #
Mar 6, 2022 15:26:27 #
Cheese wrote:
Looking for some out-of-the-box answers. 😀
May I make a suggestion?
If there’s another post similar to this, I suggest that anyone who comes up with the answer post only the answer and not how it was calculated. Providing the solution prevents others from trying to solve. Let the OP provide the solution.
Mar 6, 2022 15:34:00 #
jayluber
Loc: Phoenix, AZ
the rule is:
for any number xy:
((y+1) * x) + y
so: for 45 it would be ((5 +1) * 4) +5 = 29
and for 56 it would be ((6+1) * 5) + 6 = 41
if we take the sum of the two numbers multiplied by each other and then add them together, no way we could have an odd answer as we do with 15, 29, 5, 41 etc. and that rule makes no sense.
and besides - isn't (7x1) + (7+1) = 15 really 14????
for any number xy:
((y+1) * x) + y
so: for 45 it would be ((5 +1) * 4) +5 = 29
and for 56 it would be ((6+1) * 5) + 6 = 41
if we take the sum of the two numbers multiplied by each other and then add them together, no way we could have an odd answer as we do with 15, 29, 5, 41 etc. and that rule makes no sense.
and besides - isn't (7x1) + (7+1) = 15 really 14????
Mar 6, 2022 16:01:03 #
Cheese wrote:
Congratulations, Paradise Pirate. First to provide the correct answer, AND the explanation. 👍 Well done.
Several others and myself got the answer on the first page
Mar 6, 2022 16:16:12 #
Mar 6, 2022 16:19:32 #
Mar 6, 2022 16:24:19 #
jayluber wrote:
if we take the sum of the two numbers multiplied by each other and then add them together, no way we could have an odd answer as we do with 15, 29, 5, 41 etc. and that rule makes no sense.
if we take the sum of the two numbers multiplied by each other and then add them together, no way we could have an odd answer as we do with 15, 29, 5, 41 etc. and that rule makes no sense.
Clearly, you have not understood the problem.
If you tried applying the rule that you say makes no sense, you will find that it does.
For 45:
4x5 = 20
4+5 = 9
20+9 = 29
Mar 6, 2022 17:01:49 #
Cheese wrote:
Looking for some out-of-the-box answers. 😀
71 = 15
multiply 7x1=7
Add 7+1=8
7+8=15
Works for all sets, e.g:
7x2=14
7+2=9
14+9=23
Mar 6, 2022 17:55:59 #
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