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natita [175]
3 years ago
8

Plz help me (All my points if correct)

Mathematics
1 answer:
Yuki888 [10]3 years ago
3 0

Answer:

12 bats

Step-by-step explanation:

Let us number the bat caves from 1 to 45 and divide them into 5 parts:

a) 1

b) 2 to 29 (7\times 4=28 bats)

c) 30

d) 31 to 44 (7\times2=14 bats)

e) 45

It is given that any 7 caves in a row has 77 bats. Hence, the total number of bats in part b and d = ( 4\times77 ) + ( 2\times77 ) = 462 bats.

There remains ( 490 - 462 ) = 28 bats in cave number 1, 30 and 45.

Now, our question demands the maximum possible number of bats in cave 30.

Minimum number of bats in a cave is 2. So we shall put 2 bats in the last cave, which gives us 7\times2=14 bats in the first cave.

Therefore, the greatest possible number of bats in cave number 30 = ( 28 - 2 - 14 ) = 12 bats.

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