The mathematical problems in Sun Tzu's Calculations are applicable today. There are 30 chickens and rabbits in the same cage, and there are 84 feet under them. Ask them how many chickens and rabbits a

Suppose all chickens have feet:

2×30=60 (only)

rule

Rabbits have:

(84—60)÷(4—2)

=24÷2

= 12 (only)

Chicken: 30- 12 = 18 (only)

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