Funny Story 4 Students vs. Lecturers

There are 4 students who happened to be late to take the semester exams due to wake up late. They then devised a strategy to compact the same reasons for their lecturers to be kind enough to give a follow-up exam.

Student A: "Sir, sorry we are late for the semester exam."

Student B: "Yes sir. The four of us are on the same angkot and the angkot tires are erupting. "

Student C: "Yes we pity the driver. They assured us help him plug the new tires."

Student D: "Therefore we ask the kindness of father for us to take the follow-up exam.

The lecturer thought for a moment and finally allowed them to take the next exam the following day, but the four students were asked to do the test in 4 different rooms.

Students: "Ah, maybe let's not cheat," (he thought).

Apparently there are only two exams. With the provision they are allowed to see and do a second problem after completing the first question. The first question is very easy with the weight of the value 10. The four students work with a smile smile. Turn to read the second matter with the weight of value 90. Cold sweat began to pour. On the second note it says: "yesterday, which angkot tire was erupting?"