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Re: New cars leave a car factory in a repeating pattern of red, [#permalink]
1
Many questions on GRE test your divisibility and the ability to find patterns.
Here, we just need to find the reminder for 463%4, and we get the answer as 3(BLACK).
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Re: New cars leave a car factory in a repeating pattern of red, [#permalink]
parseltongue wrote:
Many questions on GRE test your divisibility and the ability to find patterns.
Here, we just need to find the reminder for 463%4, and we get the answer as 3(BLACK).



OK got it ..thanks.
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Re: New cars leave a car factory in a repeating pattern of red, [#permalink]
Answer is black since there is a cyclic pattern of 4.
Hence 463/4 = 3
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Re: New cars leave a car factory in a repeating pattern of red, [#permalink]
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sandy wrote:
New cars leave a car factory in a repeating pattern of red, blue, black, and gray cars. If the first car to exit the factory was red, what color is the 463rd car to exit the factory?

(A) Red
(B) Blue
(C) Black
(D) Gray
(E) It cannot be determined from the information given.


Let's examine the pattern.

CAR # | color
1 | red
2 | blue
3 | black
4 | gray
5 | red
6 | blue
7 | black
8 | gray
9 | red
.
.
.
The pattern REPEATS EVERY 4 CARS. So, we say the pattern has CYCLE 4
Also, notice that every car # that's divisible by 4 is gray

So, let's find a car # that's close to 463 and that's divisible by 4, and we'll go from there.
460 is divisible by 4, so the 460th car will be gray
This means the 461st car will be red
The 462nd car will be blue
And the 463rd car will be black

Answer: C

Cheers,
Brent
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Re: New cars leave a car factory in a repeating pattern of red, [#permalink]
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Re: New cars leave a car factory in a repeating pattern of red, [#permalink]
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