1. On the planet Sharp Teeth, animals reproduce in a special way, specifically: each hamster gives birth to four hamsters every year; each groundhog gives birth to two baby groundhogs every 3 months; and rabbits, which are mysterious creatures, reproduce faster the more time passes, specifically, if a person does not give away or buy new rabbits, then after $2k$ months, the number of their rabbits increases by $k!$ times. ($k!$ - the product of numbers from 1 to $k$).

Nikita bought rodents at the market. It is known that after a year, he had 765 domestic pets. How many rodents did Nikita buy at the market?

If there are several possible answers, list them in ascending order separated by a semicolon.
Answer: $10 ; 77 ; 153 \mid 11,77,153$

2nd variant.

On the planet Sharp Teeth, animals reproduce in a special way, specifically: every hamster gives birth to two hamsters every 3 months; every groundhog gives birth to one small groundhog every 4 months; and rabbits, which are mysterious creatures, reproduce faster the more time passes, specifically, if a person does not give away their rabbits and does not buy new ones, then after $2 k$ months the number of their rabbits increases by $k!$ times. ($k!$ is the product of numbers from 1 to $k$).

Anton bought rodents from a pet store. It is known that after a year, Anton had 720 pets. How many rodents did Anton buy from the pet store?

If there are several possible answers, write them in ascending order separated by a semicolon.

Answer: $1 ; 17 ; 90 \mid 1,17,90$

3rd variant.

On the planet Sharp Teeth, animals reproduce in a special way, specifically: every hamster gives birth to four hamsters every 4 months; every groundhog gives birth to one small groundhog every 4 months; and rabbits, which are mysterious creatures, reproduce faster the more time passes, specifically, if a person does not give away their rabbits and does not buy new ones, then after $2 k$ months the number of their rabbits increases by $k!$ times. ($k!$ is the product of numbers from 1 to $k$).

Boy Ilya bought rodents from a pet store. It is known that after a year, Ilya had 1040 domestic animals. How many rodents did Ilya buy from the pet store?

If there are several possible answers, write them in ascending order separated by a semicolon.

Answer: $13,41,130 \mid 13 ; 41 ; 130$

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