og P672 13 + h) x6 j( j$ |% Q 0 l; f! {" ^9 ~- z5 kKyle's lock combination consists of 3 two-digit numbers - U- ?! ~3 V; W# {one number is odd 7 f* H& d$ l" F2 h' Q. u% f
one number is multiple of 5# o1 p1 Z& M0 u/ j! Z- t7 `
one number is the day of the month of Kyle's birthday 3 O- V T7 i' g& b4 { $ v5 s0 L" q$ C) z
if each number satisfies exactly one of the conditions which of the following could be the combination to the lock?7 a+ w9 d+ I- I- `3 v2 g7 h
1 B3 u/ J0 Q( ?; K( F# Q9 G) B" ^ + p. p/ [1 y6 U, Y) L, I/ A
4 W# E p3 L4 I- n. _# ^) b* G
a 14 20 13 9 K$ b2 ^* @2 D! Qb 14 25 13 5 _2 I F+ ]# ^1 r6 P( C8 r' mc 15 18 16 : M q# ?$ }% h7 [0 V) wd 20 15 20/ p! ~# [3 o& K% G; X
e 34 30 21 # y9 m2 N+ h- s+ P答案是a 我觉得b d 都可已啊作者: 深海lavender 时间: 2007-9-7 13:02:10
b 有两个odd: l# Y$ E4 R! V0 P' p
d 有三个mutiple of 5 ( R( t% ?9 u. F5 w# L7 {% Z3 K0 |' s% a4 C( N
貌似这样理解satisfies exactly one of the conditions ?作者: 深海lavender 时间: 2007-9-7 13:11:29
原帖由 hyacinth 于 2007-9-7 13:10 发表 m6 `8 U4 O4 h8 N
b 有两个odd2 l6 V# B% Q# }! A
d 有三个mutiple of 5 8 O$ n( H9 S, p" V+ l* n( B2 y: w# O8 O
貌似这样理解satisfies exactly one of the conditions ?