Question

how can I buy 100 animal in hundred rupees one goat cost 50 Paisa one buffalo cost 50 Paisa 1 elephant cost 5 rupees.​

Answer 1

Ans:1 goat = 50 paisa

1 buffalo = 50 paisa

1 elephant = 5 Rupees

If you buy all cows you will spend 100 rupees on 100 animals but you will not have all 3 type

If i swap out 1 rupees worth of cows for 1 rupees worth of goats, i will have gained 19 animals, and still spend all the money.

The lowest common denominator between 4 and 19 is 76, so if I gain 76 animals by swapping out 4 rupees worth of cows for goats, and I lose 76 animals by swapping out 95 rupees worth of cows for buffalos, i will have the following:

1 cow, 19 buffalo, 80 goats

Proceeding to the next iterative answer (19 more buffalo, 80 more goats) would yield a negative amount of cows (-98 cows) which means this is the only answer.