士盛 asked in 教育與參考考試 · 1 decade ago

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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:

更改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.

How many people were going to St.Ives?

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  • 1 decade ago
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    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<1000

    開括號得100X-300+10X+50+X<1000 >>>>> 111X<1250

    X<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>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
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