Best countdown problem ever

davieddy · 2009-01-22, 20:36

100, 75, 50, 25, 11, 1
Target 278

(Use simple arithmetic on the the six numbers)

10metreh · 2009-01-22, 20:40

Quote:

Originally Posted by davieddy

100, 75, 50, 25, 11, 1
Target 278

(Use simple arithmetic on the the six numbers)

When was 11 allowed in Countdown?

Flatlander · 2009-01-22, 21:01

(11*25) + (100/50) + 1

lavalamp · 2009-01-22, 21:22

Is it ... the final countdown?

I assume you meant another 1 there instead of 11.

100/25 = 4
50 + 1 = 51

4 * 51 = 204
75 - 1 = 74

204 + 74 = 278

mart_r · 2009-01-22, 21:33

Me gots a solution:

11*25+(100+50)/75+1

Puzzling time: < 10 mins

jrk · 2009-01-23, 00:45

(75/25-1)*(100+50-11)

Mr. P-1 · 2009-01-23, 08:46

I got Flatlanders solution to the problem as posed.

If the 11 is replaced by 1 then my solution is

(50 / 25) * (100 + 1) + 75 + 1

davieddy · 2009-01-23, 10:30

I don't know why my genrally trustworthy source
deemed this such a good puzzle.

I have received a correction:

The numbers are supposed to be 25 50 75 100 10 1
Target 278

10metreh · 2009-01-23, 12:32

Quote:

Originally Posted by davieddy

I don't know why my genrally trustworthy source
deemed this such a good puzzle.

I have received a correction:

The numbers are supposed to be 25 50 75 100 10 1
Target 278

(75*100-((10+1)*50))/25=278

davieddy · 2009-01-23, 14:35

Quote:

Originally Posted by 10metreh

(75*100-((10+1)*50))/25=278

Assuming you are right (and I haven't checked) well done
and the author of the problem is redeemed

David

mart_r · 2009-01-23, 23:51

Also,

(75/25-(10+1)/50)*100=278

2009-01-22, 20:36	#1
davieddy "Lucan" Dec 2006 England 2·3·13·83 Posts	Best countdown problem ever 100, 75, 50, 25, 11, 1 Target 278 (Use simple arithmetic on the the six numbers)

2009-01-22, 21:22	#4
lavalamp Oct 2007 Manchester, UK 5·271 Posts	Is it ... the final countdown? I assume you meant another 1 there instead of 11. 100/25 = 4 50 + 1 = 51 4 * 51 = 204 75 - 1 = 74 204 + 74 = 278 Last fiddled with by lavalamp on 2009-01-22 at 21:22

2009-01-22, 21:33	#5
mart_r Dec 2008 you know...around... 3×13×17 Posts	Me gots a solution: 1125+(100+50)/75+1 Puzzling time: < 10 mins Last fiddled with by mart_r on 2009-01-22 at 21:33*

2009-01-23, 10:30	#8
davieddy "Lucan" Dec 2006 England 2×3×13×83 Posts	I don't know why my genrally trustworthy source deemed this such a good puzzle. I have received a correction: The numbers are supposed to be 25 50 75 100 10 1 Target 278 Last fiddled with by davieddy on 2009-01-23 at 10:46

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2009-01-22, 21:01	#3
Flatlander I quite division it "Chris" Feb 2005 England 31×67 Posts	(11*25) + (100/50) + 1

2009-01-23, 00:45	#6
jrk May 2008 2107₈ Posts	(75/25-1)*(100+50-11)

2009-01-23, 08:46	#7
Mr. P-1 Jun 2003 491₁₆ Posts	I got Flatlanders solution to the problem as posed. If the 11 is replaced by 1 then my solution is (50 / 25) * (100 + 1) + 75 + 1

2009-01-23, 23:51	#11
mart_r Dec 2008 you know...around... 3×13×17 Posts	Also, (75/25-(10+1)/50)*100=278