Well, are you sure they are not going to vary?? Well, in that case just go through those programs...just to pass..!!
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I guess they would be simple * printing in diff. manner or 123 in diff. manner. Or something like prime number, factorial, max number, GCD etc.
I'd better say relax and give C some time(a day or two) and just get the logic, but yes, if you are really 0 in C then just getting the logic won't help you to pass the exam better go through them in that case