Of a squirrel's hidden nuts, for every 5 that get found, there are 3 that do not get found. A squirrel hid 40 nuts all together.
How many of the nuts do not get found?
For every 5 nuts that get found, there are 3 that do not get found. So the ratio of found nuts to not found nuts is 5:3.
Let's calculate the ratio for the 40 nuts.
The number of found nuts is (5/8) * 40 = <<(5/8)*40=25>>25 nuts.
The number of nuts that do not get found is 40 - 25 = <<40-25=15>>15 nuts.
Therefore, 15 nuts do not get found.