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If x and y are prime numbers, is x(y + 3) odd? (1) x < 3 (2) y > 33
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29 Nov 2018, 02:26
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55% (01:11) correct 45% (01:07) wrong based on 128 sessions
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If x and y are prime numbers, is x(y + 3) odd? (1) x < 3 (2) y > 33
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If x and y are prime numbers, is x(y + 3) odd? (1) x < 3 (2) y > 33
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Updated on: 29 Nov 2018, 04:42
Bunuel wrote: If x and y are prime numbers, is x(y + 3) odd?
(1) x < 3 (2) y > 33 For x(y+3) to be odd, both x and y+3 must be odd. Then y must be even, and since y is prime only y = 2 works. Then the question asks 'does y = 2 and does x not equal 2'? We'll look for statements which provide this information, a Logical approach. (1) tells us that x =2, so the answer is NO. Sufficient. (2) tells us that y is not equal to 2 so NO. Sufficient. (D) is our answer.
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Re: If x and y are prime numbers, is x(y + 3) odd? (1) x < 3 (2) y > 33
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29 Nov 2018, 04:00
Bunuel wrote: If x and y are prime numbers, is x(y + 3) odd?
(1) x < 3 (2) y > 33 For X(y+3) to be odd both x & y+3 have to be odd 1 given x & y are prime numbers and x<3 so only possible value of x would be 2 so the expression x( y+3) will be even always sufficient from 2 y>33 here y would always be odd i.e 37,41 .. and y +3 would always be even so even so sufficient .. IMO D should be correct..



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Re: If x and y are prime numbers, is x(y + 3) odd? (1) x < 3 (2) y > 33
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29 Nov 2018, 04:02
DavidTutorexamPAL wrote: Bunuel wrote: If x and y are prime numbers, is x(y + 3) odd?
(1) x < 3 (2) y > 33 For x(y+3) to be odd, both x and y+3 must be odd. Then y must be even, and since y is prime only y = 2 works. Then the question asks 'does y = 2'? We'll look for statements which provide this information, a Logical approach. (1) does not provide this information Insufficient. (2) tell us the answer is NO. Sufficient. (B) is our answer. DavidTutorexamPAL from 1 wont x be 2 as given in the statement is that both x & y are prime no. wont this make it sufficient...



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Re: If x and y are prime numbers, is x(y + 3) odd? (1) x < 3 (2) y > 33
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29 Nov 2018, 04:11
Statement 1: x<3 Which means x= 2 therefore, 2(y+3) is even Sufficient Statement 2: y>33 y can be 37, 41, 43 .... which means x(even) = even Sufficient
D is the answer
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Re: If x and y are prime numbers, is x(y + 3) odd? (1) x < 3 (2) y > 33
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29 Nov 2018, 04:41
Archit3110 wrote: DavidTutorexamPAL wrote: Bunuel wrote: If x and y are prime numbers, is x(y + 3) odd?
(1) x < 3 (2) y > 33 For x(y+3) to be odd, both x and y+3 must be odd. Then y must be even, and since y is prime only y = 2 works. Then the question asks 'does y = 2'? We'll look for statements which provide this information, a Logical approach. (1) does not provide this information Insufficient. (2) tell us the answer is NO. Sufficient. (B) is our answer. DavidTutorexamPAL from 1 wont x be 2 as given in the statement is that both x & y are prime no. wont this make it sufficient... you're right! my bad, fixed. Thanks!
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Re: If x and y are prime numbers, is x(y + 3) odd? (1) x < 3 (2) y > 33
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29 Nov 2018, 06:19
Bunuel wrote: If x and y are prime numbers, is x(y + 3) odd?
(1) x < 3 (2) y > 33 x and y are primes.
Statement 1:
x<3. x=2. So the product will be even. Sufficient.
Statement 2;
y>33. only even prime is 2. all other primes are odd. 37 + 3 = 40 ( SUPPOSED). Now we don't have to know the value of x. even * odd/even = even. Sufficient.
The best answer is D.



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Re: If x and y are prime numbers, is x(y + 3) odd? (1) x < 3 (2) y > 33
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29 Nov 2018, 09:25
Bunuel wrote: If x and y are prime numbers, is x(y + 3) odd?
(1) x < 3 (2) y > 33 By definition, prime numbers are greater than 1 with only 2 divisors. The question is whether both x and y+3 are odd or not. S1: x = 2 Sufficient to say that both x and y+3 are NOT odd S2: y+3 will be even. Sufficient to say that both x and y+3 are NOT odd Answer D



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Re: If x and y are prime numbers, is x(y + 3) odd? (1) x < 3 (2) y > 33
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24 Dec 2018, 01:35
Bunuel wrote: If x and y are prime numbers, is x(y + 3) odd?
(1) x < 3 (2) y > 33 Par of GMAT CLUB'S New Year's Quantitative Challenge Set
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Re: If x and y are prime numbers, is x(y + 3) odd? (1) x < 3 (2) y > 33
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08 Oct 2019, 09:44
Bunuel wrote: If x and y are prime numbers, is x(y + 3) odd?
(1) x < 3 (2) y > 33 Asked: If x and y are prime numbers, is x(y + 3) odd? (1) x < 3 x = 2 x(y+3) = even SUFFICIENT (2) y > 33 y is odd; y+3 = even x(y+3) = even SUFFICIENT IMO D
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Re: If x and y are prime numbers, is x(y + 3) odd? (1) x < 3 (2) y > 33
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18 Oct 2019, 10:50
Bunuel wrote: If x and y are prime numbers, is x(y + 3) odd?
(1) x < 3 (2) y > 33 x,y=e,o;e,e;o,o=ie.2,3;2,2;3,3 (1) x < 3: 0<x<3… x=2… even(y+3)=even, sufic. (2) y > 33: y≠even=odd… x(odd+3)=x(even)=even, sufic. Answer (D)




Re: If x and y are prime numbers, is x(y + 3) odd? (1) x < 3 (2) y > 33
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18 Oct 2019, 10:50






