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On planet Simplon, each year has 12 months, each of which [#permalink]
25 Feb 2013, 01:17

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Difficulty:

95% (hard)

Question Stats:

41% (03:12) correct
59% (03:11) wrong based on 90 sessions

On planet Simplon, each year has 12 months, each of which consists of exactly 30 days. If Simplon experiences a political scandal every 2/3 of a year, an environmental crisis every 1/6 of a year, and a terrible movie opening every 1/36 of a year, then what is the ratio of the number of political scandals to the number of environmental crises to the number of terrible movie openings experienced over a five year period on Simplon? (Assume that all three events happen 2/3, 1/6, and 1/36 of a year after the beginning of the first year, and recur at their respective rates after that.)

A. 24 : 4 : 1 B. 1 : 4 : 24 C. 4 : 15 : 90 D. 1 : 6 : 36 E. 3 : 10 : 72

Re: On planet Simplon, each year has 12 months, each of which [#permalink]
25 Feb 2013, 04:30

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Expert's post

emmak wrote:

On planet Simplon, each year has 12 months, each of which consists of exactly 30 days. If Simplon experiences a political scandal every 2/3 of a year, an environmental crisis every 1/6 of a year, and a terrible movie opening every 1/36 of a year, then what is the ratio of the number of political scandals to the number of environmental crises to the number of terrible movie openings experienced over a five year period on Simplon? (Assume that all three events happen 2/3, 1/6, and 1/36 of a year after the beginning of the first year, and recur at their respective rates after that.)

24 : 4 : 1

1 : 4 : 24

4 : 15 : 90

1 : 6 : 36

3 : 10 : 72

So , the political scandal occurs every 8 months, the environmental crisis every 2 months and the terrible movie opening every (1/3) a month. We just have to find out the ratio between 5*\frac{12}{8} : 5*\frac{12}{2} : 5*\frac{12}{(1/3)} = \frac{1}{8} : \frac{1}{2} : 3

Re: On planet Simplon, each year has 12 months, each of which [#permalink]
18 Apr 2013, 06:49

If a scandal occurs every 8 months over a 5 year period exactly 7 scandals would have occurred. So shouldnt the ratio be

7:30:180? _________________

You've been walking the ocean's edge, holding up your robes to keep them dry. You must dive naked under, and deeper under, a thousand times deeper! - Rumi

Re: On planet Simplon, each year has 12 months, each of which [#permalink]
18 Apr 2013, 08:25

emmak wrote:

On planet Simplon, each year has 12 months, each of which consists of exactly 30 days. If Simplon experiences a political scandal every 2/3 of a year, an environmental crisis every 1/6 of a year, and a terrible movie opening every 1/36 of a year, then what is the ratio of the number of political scandals to the number of environmental crises to the number of terrible movie openings experienced over a five year period on Simplon? (Assume that all three events happen 2/3, 1/6, and 1/36 of a year after the beginning of the first year, and recur at their respective rates after that.)

A. 24 : 4 : 1 B. 1 : 4 : 24 C. 4 : 15 : 90 D. 1 : 6 : 36 E. 3 : 10 : 72

Total days per year = 12*30=360 For 5 years = 12*30*5=1800

political scandal happens every 2/3 of a year = 2/3 * 360 = 240days This implies for every 240 days 1 political scandal occurs. which means for 5yrs or 1800 days, no.of scandals that happen = 1800/240 = 15/2

smilarly environment damage happens every 1/6 of a year = 1/6 * 360 = 60 days This implies for every 60 days 1 environmental damage occurs. For 5yrs or 1800 days, no.of environmental damages that occur = 1800/60 = 30

smilarly a terrible movie opening happens every 1/36 of a year = 1/36 * 360 = 10 days This implies for every 10 days 1 terrible movie opening happens. For 5yrs or 1800 days, no.of environmental damages that occur = 1800/10 = 180

Answer==> political scandal for 5yrs : Env damages for 5yrs : Terrible movie opening for 5yrs = 1800/240 : 1800/60 : 1800/10

Re: On planet Simplon, each year has 12 months, each of which [#permalink]
18 Apr 2013, 08:31

Zarrolou wrote:

Transcendentalist wrote:

If a scandal occurs every 8 months over a 5 year period exactly 7 scandals would have occurred. So shouldnt the ratio be

7:30:180?

Hi Transcendentalist,

you missed something. 5years*12months= 60 months one scandal every 8 months means \frac{60}{8}=7.5 scandals .5 is what makes your option wrong.

This should clarify, let me know

How does .5 of a scandal occur?

Lets say there are 1 scandal every 5 months

In one year - 2 scandals will occur 2 years - 4 scandals will occur 3 years - 7 scandals will occur _________________

You've been walking the ocean's edge, holding up your robes to keep them dry. You must dive naked under, and deeper under, a thousand times deeper! - Rumi

Re: On planet Simplon, each year has 12 months, each of which [#permalink]
18 Apr 2013, 11:18

Expert's post

Transcendentalist wrote:

If a scandal occurs every 8 months over a 5 year period exactly 7 scandals would have occurred. So shouldn't the ratio be

7:30:180?

Lets assume what you said is correct. The ratio is 7:30:180. So now for every 30 environmental crisis, 7 scandals occur. Thus, for 60 crisis, we should have 14 scandals. But if you go by what is given in the problem, we would have 15 scandals. Any guesses? _________________

Re: On planet Simplon, each year has 12 months, each of which [#permalink]
19 Apr 2013, 07:12

vinaymimani wrote:

Transcendentalist wrote:

If a scandal occurs every 8 months over a 5 year period exactly 7 scandals would have occurred. So shouldn't the ratio be

7:30:180?

Lets assume what you said is correct. The ratio is 7:30:180. So now for every 30 environmental crisis, 7 scandals occur. Thus, for 60 crisis, we should have 14 scandals. But if you go by what is given in the problem, we would have 15 scandals. Any guesses?

Nope the ratio holds true only for 5 years. If the period being considered is 10 years, then the ratio changes. I haven't calculated it out but for every change in no of years the ratio changes accordingly. Makes sense? _________________

You've been walking the ocean's edge, holding up your robes to keep them dry. You must dive naked under, and deeper under, a thousand times deeper! - Rumi

Re: On planet Simplon, each year has 12 months, each of which [#permalink]
19 Apr 2013, 07:28

Expert's post

Transcendentalist wrote:

vinaymimani wrote:

Transcendentalist wrote:

If a scandal occurs every 8 months over a 5 year period exactly 7 scandals would have occurred. So shouldn't the ratio be

7:30:180?

Lets assume what you said is correct. The ratio is 7:30:180. So now for every 30 environmental crisis, 7 scandals occur. Thus, for 60 crisis, we should have 14 scandals. But if you go by what is given in the problem, we would have 15 scandals. Any guesses?

Nope the ratio holds true only for 5 years. If the period being considered is 10 years, then the ratio changes. I haven't calculated it out but for every change in no of years the ratio changes accordingly. Makes sense?

I can-not in any way imagine how a given ratio can change depending upon the number of years. Say red:blue balls ratio --> 2:3. So are you telling me that for every 1 red ball the ratio should be 1:1.5(and as per your logic by dropping the 0.5 )-->1:1? So for 1 red ball, the ratio is 1:1, for 2 red balls, the ratio is 2:3 and for 4 red balls, the ratio is again 2:3?

The fact that 1.5 balls can't exist is correct. But the fact that ratio can be presented in myriad ways is also correct. So when I say that the ratio of red:blue balls = 2:3 = 1:1.5 --> it is all correct. It is just that the latter ratio is an intermediate value, something which is mathematically correct yet not feasible,physically. The fact that for 10 years , the value 7.5=15/2 when multiplied by 2 gives an integral value is the reason why we have 15 scandals over 10 years, which is not possible for 5 years as it gives a non-integral value(7.5);which is mathematically correct, yet not feasible in the physical world. _________________

Re: On planet Simplon, each year has 12 months, each of which [#permalink]
19 Apr 2013, 07:50

vinaymimani wrote:

I can-not in any way imagine how a given ratio can change depending upon the number of years. Say red:blue balls ratio --> 2:3. So are you telling me that for every 1 red ball the ratio should be 1:1.5(and as per your logic by dropping the 0.5 )-->1:1? So for 1 red ball, the ratio is 1:1, for 2 red balls, the ratio is 2:3 and for 4 red balls, the ratio is again 2:3?

The fact that 1.5 balls can't exist is correct. But the fact that ratio can be presented in myriad ways is also correct. So when I say that the ratio of red:blue balls = 2:3 = 1:1.5 --> it is all correct. It is just that the latter ratio is an intermediate value, something which is mathematically correct yet not feasible,physically. The fact that for 10 years , the value 7.5=15/2 when multiplied by 2 gives an integral value is the reason why we have 15 scandals over 10 years, which is not possible for 5 years as it gives a non-integral value(7.5);which is mathematically correct, yet not feasible in the physical world.

Lets just start with a blank slate.. Would you please answer the following problem for me?

On planet Simplon, each year has 12 months, each of which consists of exactly 30 days. If Simplon experiences a political scandal every 2/3 of a year, an environmental crisis every 1/6 of a year, and a terrible movie opening every 1/36 of a year (Assume that all three events happen 2/3, 1/6, and 1/36 of a year after the beginning of the first year, and recur at their respective rates after that.)

Can you please calculate the ratio of the No of following events over a 5 year period to that over a 10 year period?

1, Political Scandal 2, Environmental Crises 3, Terrible _________________

You've been walking the ocean's edge, holding up your robes to keep them dry. You must dive naked under, and deeper under, a thousand times deeper! - Rumi

Re: On planet Simplon, each year has 12 months, each of which [#permalink]
19 Apr 2013, 08:47

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Expert's post

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emmak wrote:

On planet Simplon, each year has 12 months, each of which consists of exactly 30 days. If Simplon experiences a political scandal every 2/3 of a year, an environmental crisis every 1/6 of a year, and a terrible movie opening every 1/36 of a year, then what is the ratio of the number of political scandals to the number of environmental crises to the number of terrible movie openings experienced over a five year period on Simplon? (Assume that all three events happen 2/3, 1/6, and 1/36 of a year after the beginning of the first year, and recur at their respective rates after that.)

A. 24 : 4 : 1 B. 1 : 4 : 24 C. 4 : 15 : 90 D. 1 : 6 : 36 E. 3 : 10 : 72

Detouring briefly from the tangent questions, a nice shortcut to solve this original questionquickly is to think of the numbers in months. You then see that political scandals happen every 8 months and environmental crises happen every 2 months, so the ratio must be 1:4 (or a multiple thereof) regardless of the terrible movie openings (Die Hard 5 anyone??). The only answer choice with the 1:4 ratio is B. No need to go any further. On different questions if you can eliminate answer choices based on two of the three entries, then you don't have to try mentally juggling the three.