M A T H 2 1 B
Mathematics Math21b Spring 2017
Linear Algebra and Differential Equations
Exams
Office: SciCtr 432

### Final exam

The Math21b final exam took place May 9, 2017 from 2:00 PM to 5:00 PM. The exams schedule gave the exams locations:
```Tuesday 9-May 2:00 PM  A-L Science Center C
Tuesday 9-May 2:00 PM  M-Z Emerson 105
```
We had a global review scheduled for 5-6:30 PM on May 3, 2017 in Hall B. This review covered all the material. Here is the exam with a solution draft. The average of the final was 82/100 with a standard deviation of 11.

 The Final Exam Solution Draft

Here were some practice exams:
 Practice exam 1 [PDF] Solution 1 [PDF] Practice exam 2 [PDF] Solution 2 [PDF] Practice exam 3 [PDF] Solution 3 [PDF] Practice exam 4 [PDF] Solution 4 [PDF] Practice exam 5 [PDF] Solution 5 [PDF] Practice exam 6 [PDF] Solution 6 [PDF] Practice exam 7 [PDF] Solution 7 [PDF] Practice exam 8 [PDF] Solution 8 [PDF] Practice exam 9 [PDF] Solution 9 [PDF]

### Second hourly

The first and second midterm exam dates are Tuesdays: the first hourly(1) on February 28 and the second hourly on April 4, both at 7 PM. The term "hourly" is a traditional "harvard jargon" which has been used since centuries. The term is also used in other universities. The etymology is that early exams used to be one hour long. We had a global review on April 2, 2017, during 7-8:30 PM, in Hall C. The second hourly covered all the material up to Friday March 31. The exam took place in two exam rooms, one was Yenching auditorium, the other was SC Hall D. The average was 78, the standard deviation 12.

 Hourly 2 Solutions

```Tue 4/4/2017  7PM Tue 2 Divinity Av_118_Yenching Auditorium, Last name A-L (254 seats)
Tue 4/4/2017  7PM Tue Science Center - ScienceCtr Hall D     Last name M-Z (259 seats)
```
Here were the practice exams:
 Practice exam 1 [PDF] Solution 1 [PDF] Practice exam 2 [PDF] Solution 2 [PDF] Practice exam 3 [PDF] Solution 3 [PDF] Practice exam 4 [PDF] Solution 4 [PDF] Practice exam 5 [PDF] Solution 5 [PDF] Practice exam 6 [PDF] Solution 6 [PDF]

### First hourly

The first hourly took place on Tuesday, 7 PM, on February 28, 2017 in Science Center Hall B. We had a global review on Sunday, 2/26/2017 at 7 PM in Science Center Hall C. The average of the exam was 84, the standard deviation 8.

 Hourly 1 Solutions

Here were some practice exams with solutions.
 Practice exam 1 [PDF] Solution 1 [PDF] Practice exam 2 [PDF] Solution 2 [PDF] Practice exam 3 [PDF] Solution 3 [PDF] Practice exam 4 [PDF] Solution 4 [PDF] Practice exam 5 [PDF] Solution 5 [PDF] Practice exam 6 [PDF] Solution 6 [PDF]

### Final exam

The final exam date for Math 21b is May 9, 2017.

### General policies

All exams are closed books and without the use of any technology. Official policy at Harvard is that "out of sequence midterm exams" are only offered for students observing religious holidays. We sometimes can accommodate students who happen to have an academic conflict like lab, important sports event at the same time (game or tournament) or a concert or theater event. In case of a qualifying conflict, contact Oliver to see whether it is possible to arrange the exam earlier at the same day. Requests have to come at least a week before the exam.