gre数学考试关于算术的重点试题(2)

会计考友

11. Of the following， which is most nearly equal to 2/3？
    A.3/4
2 S' H  X/ \! U    B.5/6
: k5 x7 J1 D, ~# L8 ?& c) ]    C.7/9
    D.11/15
    E.15/21
    答案：E
    12. One month Mary used 1/6 of her monthly salary for a car payment and 1/4 more than the car payment for rent. What fraction of her monthly salary did Mary use that month for the car payment and rent combined？
    A.5/24
    B.3/8
% P+ [' ]" Z4 @    C.5/12
9 G9 Z' w. u2 e5 ~$ ^) W( y# F    D.1/2
" A7 A! O! }8 G% c0 ~    E.7/12
: u# [' l# `. ^) R5 r4 ?2 i    答案：B
    13.For which of the following pairs of integers is the least common multiple of the integers minus their greatest common divisor the greatest？
2 J2 R% J" `  F* ]7 d, @" i. M# z    A.3，12
    B.5，6
1 D: d; i8 Y) z1 x& c0 e' j0 H8 J    C.10，20
    D.11，12
  B$ i8 ?6 K9 f    E.15，30
3 i& |  c  G$ F) k. h    答案：D
, r6 v. k: p* h, n5 c; I    14. X percent of 24 is 12
' I5 |$ K; {/ T0 O: t5 w    x
7 D' F, ^* o% g7 G    50
0 g; u+ h7 n  p) L* V    答案：C
& U) U* y+ e! k1 ?, E* A    15.When x+2 is divided by 5 the remainder is 3
    The remainder when x is divided by 5
# I+ ]" u! g" j3 e5 @. z$ |    2
. h3 @1 W, N( }' w& e2 t# r
+ n+ E2 e/ k( a( E% ?" f7 F( E    答案：B

会计考友

</p>    16.In a list of numbers， the first number is 3， the second is 4， and each subsequent number is the sum of all the preceding numbers in the list. If the 20th number in the list is x， what is the 25th number in the list？
    A.7x
* |! p& v( Y2 J6 K8 G- d: n5 h' l* d- i+ ]    B.16x
    C.32x
  t1 }% W5 r& V/ p    D.35x
    E.161x
* n' ^$ r2 i* j; o; R9 [    答案：C
    17.Which of the following numbers is both a factor of 48 and a multiple of 6？
! }' ]& H" l: f7 T1 g    A.2
    B.8
8 e! ]: e! \5 N8 |    C.12
6 e1 W  w) R, s5 b    D.16
, T& m' J9 a* c7 T( t0 `' a. w/ c    E.18
    答案：C
+ J: y8 T. p) I7 M& ?    18.The least common denominator of 1/2，1/3，and1/4
    15
    答案：B
. G9 _  c" }- r8 x& X2 r2 ]    19.If r and s are positive integers， each greater than 1， and if 11（s-1）=13（r-1）， what is the least possible value of r+s？
    A.2
% P0 E$ O/ k- _' @    B.11
' `# D. T" h5 {  q    C.22
    D.24
- A: }  m5 {* z# m    E.26
    答案：E
; {3 B. f; ~0 W) }    20.When integer n is divided by 9， the remainder is 2.
5 |+ k! f2 T! P    The remainder when n is divided by 3
    2
6 x/ f) q0 _; o" Q    答案：C