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Old 04-04-2012, 04:31 PM
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eddiehimself eddiehimself is offline
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Default Re: IQ test. You will like it but it is tough.

Quote:
Originally Posted by resohead View Post
In printing an article of 48,000 words, a printer decides to use two sizes of type. Using the larger type, a printed page contains 1800 words. Using smaller type, a page contains 2400 words. The article is allotted 21 full pages in a magazine. How many pages must be in smaller type?
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This is a simultaneous equation. If we call x the number of pages in large type and y the number of pages in small type, then

1800x + 2400y = 48 000 (1)

and

x + y = 21 (2)

so then

1800x + 1800y = 37 800 (3)

if we then subtract 3 away from 1, we get

600y = 10 200

y = 17

then substituting that value into (2),

x + 17 = 21

x = 21 - 17 = 4

Then in order to check you can use the 1st equation

1800 * 4 + 2400 * 17 = 48 000

Same result, so we know these are the correct values. So in other words you will have 4 pages of larger type and 17 pages of smaller type.
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