Segementation Fault, post your code here so that we can help you out (if not fixed yet)

attempt resulted to: Test Crashed
Caught unexpected signal: SIGSEGV (11). Invalid memory access.
what is the meaning of this error?
I'm using C

fixed

ruby still uses rand(0..100)

fixed with all tests having n > 1

fixed

Problem stated that n > 1 but test have n = 0 and n = 1

nice

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4 * 25 = 100 - 25 change for 50 = 100 - 75 + 25 = 50 -25 = 25 :)

Again, the tests are ok, think about how you give change when they pay you with a 100 dollars bill (there are two ways, you're using the wrong one when you can use the other).

No only two this examples are wrong remaining all are correct check and get back to me

Both tests are ok, you're giving back the change wrong.