UC知道Squess Your Brain
来源：百度知道 编辑：UC知道 时间：2024/07/04 06:59:48
Here is a math problem, not too hard, but definitely worth the point I am gonna give to.
A zoo earned $120 from 120 people. It charges each man $5, each woman $2, and each kid 10cents ($0.1)
Question: How many men, women, and kids visited the zoo?
(the question is complete, no more question about it, just squess your brain. have fun!)
A zoo earned $120 from 120 people. It charges each man $5, each woman $2, and each kid 10cents ($0.1)
Question: How many men, women, and kids visited the zoo?
(the question is complete, no more question about it, just squess your brain. have fun!)
M is the number of men.
W is the number of women.
K is the number of kids.
Therefore:
5M+2W+0.1K=120
M+W+K=120
K must be 10A (A is the integer).
Therefore:
5M+2W+A=120
M+W+10A=120
Or:
5M+2W=120-A
2M+2W=240-20A
Or:
5M+2W+A=120
5M+5W+50A=120
Therefore:
3M=19A-120
3W=480-49A
That means A must be 3B (B is the integer).
So:
M=19B-40
W=160-49B
B can only to be 3 in order to keep both M and W be positive.
17 man 13 woman 90 kids
一楼的真厉害撒！我怎么也做不出来！能告诉具体步骤吗？？
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