Question

three birds live in a nest. One bird returns to the nest every 2 days. Another bird returns every 3 days and the 3rd bird returns every 5 days. All 3 birds are in the nest today. How many days in the nest 3 months (91 days) will exactly 2 birds be in the nest?

Answer 1

In 3 months (91 days), exactly 2 birds will be in the nest for 31 days.

Step-by-step explanation:

To determine how many days in 3 months (91 days) exactly 2 birds will be in the nest, we need to find the number of days where exactly 2 birds return to the nest.

We can find the common multiples of 2, 3, and 5 to determine the days when exactly 2 birds return.

The common multiples of 2, 3, and 5 are: 30, 60, and 90.

Since we are looking for the number of days in 3 months (91 days), we can see that in the first 30 days, exactly 1 bird will return, in the next 30 days (days 31-60), exactly 1 bird will return, and in the last 31 days (days 61-91), exactly 2 birds will return.

Therefore, in 3 months (91 days), exactly 2 birds will be in the nest for 31 days.

Answer 2

Most birds nest only once per year, but some species, like the American Robin, can have up to 4 or 5 nests during a single breeding season. After leaving the nest (fledging) young birds typically remain close to their parents for a short period.

Step-by-step explanation: