gre数学考试关于算术的重点试题(4)

会计考友

31.The number of different prime factors of 48
( Y, K6 ^! b: @    The number of different prime factors of 72
    答案：C
+ p8 r. Z7 \- g3 M6 \7 z8 g    32.The number of different positive divisors of 12
  g' h9 @- M! y0 B. h9 B1 v; P% V    The number of different positive divisors of 50
    答案：C
7 y+ c7 y8 ^9 [* e( k( O    33.The number that is as much greater than 63 as it is less than 101
  f: X) O3 f# m0 R    答案：B
1 K; V2 q0 e5 ?- y. \$ N    34. A K-number is a positive integer with the special property that 3 times its units‘ digit is equal to 2 times its tens’digit.
    The number of K-numbers between 10 and 99
( T5 R3 `0 l6 z7 i4 V: u# V% E    答案：C
    35.Of the following which is greatest？
    A.1/2
. M; V+ f9 D1 U& t) |' P) q6 e    B.7/15
    C.49/100
    D.126/250
3 z; c2 ^0 R' ]1 V# [% t    E.1999/4000
. ~( q* O! T5 [# L
    答案：D

会计考友

</p>    36.If n=pqr， where p，q， and r are three different positive prime numbers， how many different positive divisors does n have， including 1 and n？
    A.3
    B.5
    C.6
    D.7
% X% m) ]. q- V- L2 A3 {1 W* b6 ?    E.8
    答案：E
& m5 A0 k: H7 i    37.11*13*17*19*23
    A decrease of 1 in which of the factors above would result in the greatest decrease in the product？
7 [7 V3 c* w5 ^  r    A.11
5 F, b3 k3 }; }; K7 D4 p) B    B.13
    C.17
    D.19
    E.23
    答案：A
: D. f- X4 X7 ^    38.Which of the following numbers is not the sum of three consecutive odd integers？
    A.15
    B.75
    C.123
% H0 }/ r0 \7 C, _6 m    D.297
! n: V9 O2 P' f8 C  @" ~$ s) @    E.313
1 Z* ~/ r& W4 z2 J. s    答案：E
    39.A dresser drawer contains 15 garments. If 40 percent of those garments are blouses， how many are not blouses？
    A.6
. Q) F7 P* v7 d2 c# J' r    B.8
/ r$ M4 f' q3 Y. h& s; `& v    C.9
3 k' a2 Z6 h8 y+ E& ^9 W7 v" s, t  h    D.10
" C$ @5 \% Q) U+ h; s    E.12
    答案：C
    40.If a certain company purchased its computer terminals for a total of $540，400 and each of the terminals was purchased for $350， how many terminals did the company purchase？
3 @9 x# |- ~, h( T, F9 W: p    A.1，624
0 v3 q/ `2 j0 W& ]4 [# l) f! [1 P' A    B.1，544
    C.1，434
  p' C* E/ u% {4 x/ n    D.1，384
2 ]9 M' u4 ]; d1 d    E.1，264
8 d. H  Y$ ?7 a% Y' v$ a, a    答案：B