Maths question

👨🏻‍🏫 學術台數學

[匿名]

2010-12-25 7:04 am

There are 4 positive numbers w, x, y and z.By multiplying two of these numbers each time, I have 6 products wx, wy, wz, xy, xz and yz.Given that 5 of these products are 2, 3, 4, 5 and 6 (not in order), what is wxyz?Plz Explain.

回答 (4)

[匿名]

2010-12-25 9:58 pm

✔ 最佳答案

(http://hk.knowledge.yahoo.com/question/question?qid=7010122400630)

Dividing the products into 3 groups, say:

(I) xy and ab

(II) xa and yb

(III) xb and ya

When each of these groups are multiplied together, all will give abxy.

Also, note that 2 x 6 = 3 x 4.

So we can deduce that any 2 of these 3 groups should have products 2, 6 and 3, 4.

Therefore we have abxy = 12

參考: http://hk.knowledge.yahoo.com/question/question?qid=7010122400630

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匿名

2010-12-25 7:33 am

如果答案是12
那個數值為5的積是如何來的呢?

2010-12-24 23:42:43 補充：
我明白我的錯處了~
我把number看成了Integer

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