GRE-Math-Questions-to-Know-by-Test-Day-2nd-Edition_pag164

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Answers ‹ 155
17. (D) The common denominator for 10, 11, and 12 is 660. So, =10
11
600
660
 and 
 =601
660
600
660
10
11
, then Quantity A is greater. Because 
you found different results (one where Quantity A was greater and one where Quantity B 
was greater), the relationship cannot be determined from the information given. Select (D).
18. (B) The middle integer of three consecutive integers is their sum divided by 3. Thus, 
the middle integer is − = −51
3
17. Hence, the three consecutive integers are − −18, 17, and 
−16. Quantity A is the least of the three integers, −18. Quantity B is greater.
19. (C) =x120% 96 implies = = =x 96
120%
96
1.2
80 (Quantity A). The two quantities are 
equal. Select (C).
20. (D) Substitute values for x. If x = 2, Quantity A is =x 210 10 and Quantity B is 
= =x( ) (2 ) 210 6 10 6 60. In this case, Quantity B is greater. If x = 1
2
, Quantity A is =1
2
1
2
10
10
 
and Quantity B is 1
2
1
2
1
2
10 6 60
60
= = . In this case, Quantity A is greater. Because you 
found different results (one where Quantity A was greater and one where Quantity B was 
greater), the relationship cannot be determined from the information given. Select (D).
21. (A) Eliminate (D) because only numbers are involved. The number 68 is ⋅2 172 , so its 
greatest prime factor is 17 (Quantity A). The number 65 is ⋅5 13, so its greatest prime factor 
is 13 (Quantity B). Quantity A is greater.
22. (A) Quantity A, the ratio of milk to flour, equals = ≈
1
1
1.5
1.75
0.857
1
2
3
4
. Quantity A 
is greater. Tip: Knowing the decimal equivalents of common fractions such as =1
2
0.5 and 
=3
4
0.75 is helpful.
23. (B) Express x, y, and z as x, +x 2, and +x 4, respectively. Quantity A is + −y z2( ) 6 = 
( )+ + + −x x2 ( 2) ( 4) 6 = + −x2(2 6) 6 = + −x4 12 6 = +x4 6. Quantity B is + +x y2( ) 6 = 
( )+ + +x x2 ( 2) 6 = + +x2(2 2) 6 = + +x4 4 6 = +x4 10. Quantity B is greater.
24. (A) Eliminate (D) because only numbers are involved. Quantity A is + +(3 5)(3 5) = 
+ + +9 3 5 3 5 ( 5)2 = + +9 6 5 5 = +14 6 5 > 20 (because 6 5 > 6). Quantity A is 
greater.
06_McCune_Answer.indd 155 2/21/22 4:52 PM