# 英 文 聖誕節

Q1.The ages of a father and son add up to 66.The father`s age is the son`s age reversed.

Q2.There was a man on the way to St.Ives,He met a man with seven wives,each woman had seven sacks,In eaach saack were seven cats.

How many people were going to St.Ives?

Q3.A farmer had 18 sheep.Unfortunately all but 2 died.How many sheep did the farmer have left?

Q4.I am a three digit number.My tens digit is five more than my ones digit.My hundreds digit is eight less than my tens dight.What number am I?

Update:

How many people were going to St.Ives?

Rating

Q1.The ages of a father and son add up to 66.The father`s age is the son`s age reversed.

父親+兒子的年齡是66歲 父親的年齡是兒子年齡的十位數跟各位數反過來排列

設父親10位數=X 各位數=Y 則兒子年齡十位數=Y 各位數=X

得X+Y=6 推測X=4 Y=2 父親42歲 兒子24歲

Q2.There was a man on the way to St.Ives,He met a man with seven wives,each woman had seven sacks,In each sack were seven cats.

有一人在要去St.Ives的途中，他遇見了有七個妻子的一個人，每名婦女有七個大袋，在每個大袋是七隻貓 有幾人要去St.Ives?

1+1+7=9

Q3.A farmer had 18 sheep.Unfortunately all but 2 died.How many sheep did the farmer have left?

一個農夫有18隻綿羊 不幸地 有2之死掉了 農夫剩幾隻羊?

18-2=16

Q4.I am a three digit number.My tens digit is five more than my ones digit.My hundreds digit is eight less than my tens dight.What number am I?

有個3位數的數字 10位數比各位數大5 百位數比10位數小8 這個數字是多少?

設個位數=X 則10位數=X+5 百位數=X-3

100(X-3)+10(X+5)+X&lt;1000

開括號得100X-300+10X+50+X&lt;1000 &gt;&gt;&gt;&gt;&gt; 111X&lt;1250

X&lt;1250/111約等於11.26

X最大值=4 因為5.6.7.8.9.10.11 全部+5後皆&gt;10 而X不得為3以下 因為3-3=0 百位數=0

最後帶入假設得數字為194

Source(s): 自己