Exercice 1

Then, we have different exercices for you, two of maths and one of physics :

Exercice 1 :

In the market, ducks cost £5 each, hens cost £1 each, and baby chickens were 20 for £1. Cindy bought at least one of each, 100 birds altogether, for a total amount of £100. Then How many of each did Betty buy ?

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