Question

50 birds peck grain. The first bird pecked 40 granules; the second bird pecked 60 granules; and each of the following birds pecked the mean of the granules that were pecked by all the previous birdies. How many granules did the 50th bird peck?

Answer 1

Explanation:

50 granules was pecked by the 50th bird

Answer 2

50.

Explanation:

As you can see the third bird pecks 60 + 40 /2 = 50 granules. The fourth bird thus pecks 60 + 40 + 50 /3 = 50 granules. The fifth bird pecks 60 + 50 + 50 + 40/4 = 50 granules. As you can see, it will always be 50 after this.