问一道og 的math

sdchUID: 2392811

og P672 13

1 ~9 \: h9 q! `" L3 T9 v' x8 h2 i  @Kyle's lock combination consists of 3 two-digit numbers
one number is odd
6 l% ~( a$ o) m+ Z/ Hone number is multiple of 5
6 K* |- W. K9 L* u7 Tone number is the day of the month of Kyle's birthday
1 H: f* `- a0 ?  n  R5 p
if each number satisfies exactly one of the conditions which of the following could be the combination to the lock?
: ~; q2 S8 u! v- P9 k; N7 [  t

% u- P, q+ v$ X' w9 s0 X+ a/ G% ^& L( {
, O% n$ B7 K1 V2 T: }/ L$ ba 14 20 13
b 14 25 13
c 15 18 16
& n4 n) l9 `. x& g8 e# Kd 20 15 20
4 M. y$ Y- b- [# ?8 O5 De 34 30 21
; s2 h5 B: Y  D: A8 y$ e6 N答案是a　我觉得b d 都可已啊

深海lavenderUID: 2350207

题目中说每个数字只满足一个条件,B有2个奇数了,D有2个一样的.

hyacinthUID: 2184492

b 有两个odd
+ g$ w) S( n) f7 U( [& n- jd 有三个mutiple of 5
' t% W8 o0 M, E. K" F+ \
貌似这样理解satisfies exactly one of the conditions ?

深海lavenderUID: 2350207

原帖由 hyacinth 于 2007-9-7 13:10 发表
b 有两个odd
  u( D3 u+ u$ W) C+ l& o: \8 h. _d 有三个mutiple of 5
7 X, T6 m; \* `, C$ c3 H# q
貌似这样理解satisfies exactly one of the conditions ?

exactly.

sdchUID: 2392811

dinggggggggg       感激不尽！！:) :funk: