I got that solution after several minutes. It is a fairly standard technique to add or subtract one of the numbers from the target to see if that is easier, and in this case 911 minus 7 gives 904 which is divisible by 8 and we have an 8 to play with. The trouble with this technique is you have to get lucky with which order you try the additions/subtractions or you run out of time (as I did, and presumably Rachel did). I thought I'd solved 911 inside 30 seconds but a slip of the brain left me 10 off.
100 × 7 - (9 + 2) = 0 (easy one to start) (75 - 3)(5 + 5) + 50 + 1 = 0 (almost lost the plot, but managed) 50 × 10 - (8 + 5 - 1) = +1 (I don't know if I can get it any closer within the time limit) I don't see it in the time limit, so that one's a lost.
I hate it when people make it needlessly complicated like that first one. Unless you're going to do something really clever, like multiply upto 6890 and then divide by 100, then just do it the easy way. No one is impressed that you can find convuluted way to get there when the easy one is so obvious.
Numbers and letters rounds should be Olympic sports
How did Rachel miss the easy 911?
75-25=50, 7x9=63, 50+63=113, 8x113=904, 904+7=911
(I used a solver)
How is that easy? Not to mention, you admitted to using assistance.
I got that solution after several minutes. It is a fairly standard technique to add or subtract one of the numbers from the target to see if that is easier, and in this case 911 minus 7 gives 904 which is divisible by 8 and we have an 8 to play with.
The trouble with this technique is you have to get lucky with which order you try the additions/subtractions or you run out of time (as I did, and presumably Rachel did).
I thought I'd solved 911 inside 30 seconds but a slip of the brain left me 10 off.
@@litigioussociety4249 I Said I used a solver to show I was joking about it being easy...
@@litigioussociety4249i guess you don’t get sarcasm…
NIce sweater Colin
911 is prime, so I took a 7 off and 904 is 113*8.
9*7 is 63, 75-25 is 50, add them together and multiply by the 8, then add 7
75+5-3=77, *50/5=770, +1=771
I got the 489 as 50*10=500, 500-10=490. Then 490-1=489
100 × 7 - (9 + 2) = 0 (easy one to start)
(75 - 3)(5 + 5) + 50 + 1 = 0 (almost lost the plot, but managed)
50 × 10 - (8 + 5 - 1) = +1 (I don't know if I can get it any closer within the time limit)
I don't see it in the time limit, so that one's a lost.
I did the last one. By about the end of the show. Unless my math is wrong. Again.
25+75+9 = 109
*8 = 872
+ 7 +7= 886
+25 = 911.
You're using the 25 twice. Still very impressive!
489:
50 - 1 = 49
49 * 10 = 490
490 + 8 - 9 = 489
50 * 10 = 500
5 - 1 = 4
8 / 4 = 2
500 - 9 - 2 = 489
50 + 10 = 60
60 * 8 = 480
480 + 9 = 489
For 489 I got
9*50=450 +
8*5=40=490, then subtract 1.
Did anyone else get that?
That 911 is mega hard - did manage to find a way - took longer than the 30 seconds though
(7 x 7 + 9) x (25 - 8) - 75
I was surprised he guessed wrong on diaphragm. As soon as she guessed something with d-, I instantly saw it, and assumed he did too.
911:
25 - 8 = 17
7 * 7 = 49
49 + 9 = 58
58 * 17 = 986
986 - 75 = 911
9 * 7 = 63
75 + 63 - 25 = 113
113 * 8 = 904
904 + 7 = 911
489 = 50 x 10 - 9 - 8/(5 - 1)
or (50 - 1) x 10 - (9 - 8)
And I got diaphragm for once 😊
489=10×(50-1)-9+8
771=50/5×(75+5-3)+1
689=7×100-9-2
Sigh, Rachel is a goddess!
Everyone knows that. She's the ultimate pin-up.
She is so beautiful. The ultimate pin-up.
I hate it when people make it needlessly complicated like that first one. Unless you're going to do something really clever, like multiply upto 6890 and then divide by 100, then just do it the easy way.
No one is impressed that you can find convuluted way to get there when the easy one is so obvious.
100-2 = 98X7 = 686 9-6 = 3+686 = 689
9+2 = 11 100X7 = 700-11 = 689
5-3 = 2+75 = 77 50÷5 = 10X77 - 770+1 = 771
75-3 = 72 5+5 = 10X72 = 720+50+1 = 771
5+1 = 6X8 = 48X10 = 480+9 = 489
50+10 = 60X8 = 480+9 = 489
9X7 = 63 75-25 = 50+63 = 113X8 = 904+7 = 911
7X7 = 49+9 = 58 25-8 = 17X58 = 986-75 = 911
771:
75 + 5 - 3 = 77
77 * 50 / 5 = 770
770 + 1 = 771
75 - 3 = 72
5 + 5 = 10
72 * 10 = 720
720 + 50 + 1 = 771
75 + 3 - 1 = 77
77 * 50 = 3850
3850 + 5 = 3855
3855 / 5 = 771