Latest GRE Aptitude Question SOLUTION: Express 585 as a product of prime numbers.

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(#M40000285) GRE Numerical Ability question ARITHMETIC PROBLEM Keep an EYE

Express 585 as a product of prime numbers.

Asked In GRE neeraj (14 years ago)

Solved hitesh gakhar Read Solution (11)

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Read Solution (11) :

janani  (14 years ago)

13*5*3*3=585

Is this solution Helpfull? Yes (4) | No (1)  

cyril k joy  (14 years ago)

113*5

Is this solution Helpfull? Yes (3) | No (2)  

Tijo Jose  (14 years ago)

585 = 5*113

Is this solution Helpfull? Yes (2) | No (1)  

Tijo Jose  (14 years ago)

585 = 5*117

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Tijo Jose  (14 years ago)

585 = 5*117 = 5*(3*39) = 5*3*(3*13).
So, 585 = 13*5*5*3

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hitesh gakhar  (14 years ago)

585= 5*13*3*3

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Tijo Jose  (14 years ago)

Hi hi. Right... 585 = 13*5*3*3 and not 13*5*5*3 :)

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Saranya Kumar  (14 years ago)

585=13*5*3*3

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ankita parmar  (9 years ago)

13*5*3*3=585

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amitabha ghosh  (7 years ago)

585 = 5*13*3*3

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surya  (4 years ago)

Can it be solved with less calculations ?
possible numbers:

2..8

only because rest higher number would become greater than 4 digits when multiplied by 4, and the last digit cannot be 1 so that we can skip the smaller numbers as well.

Reverse of 2..8 is 8..2
(2000+100x+10y+8)∗4=(8000+100y+10x+2)
8000+400x+40y+32=8000+100y+10x+2
390x+30=60y
195x+15=30y

Possible solution:x=1,y=7
Number:2178

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