Answers to Past Problem Sets and Other Info

[Boyd Blackburn]

Smith MathCounts Club,

This email includes the answers to recent MathCounts Problem Sets you have been working on for the past month.  Sorry for the delay.  Expect one "Answer Key" email per week with the from now on.

Many of the answers that are not in the text of this email are in this year's 2016-17 MathCounts School Handbook (Warmup 1, Warmup 2, etc...).  You can look up the answer yourself in that document (which I have included as an attachment).

Also, since we only have three days of school this week, this is a good week to put in some extra MathCounts training on your own.  

Coming competitions where you can show what you've learned:

Tuesday, Nov. 15  AMC8  (given in your normal math class that day)

     Note: If you are in a regular Math 6, Math 7, or Math 8 class, your whole class is not scheduled to take the AMC8, but since you are doing MathCounts, maybe you would like to give it a try?  Tell Dr. Blackburn or Ms. Haber at Monday's MathCounts and we will make arrangements for you.

Monday, Dec. 12  MathCounts School Competition

   Note: This will be the last day of the MathCounts Club and it's not far away.  Let math problem solving be a focus for you over the next month - build yourself into a math beast.

Sept 26 Week

SEE 2106-17 School Handbook

October 10 Week

SEE 2106-17 School Handbook

October 17 Week

SEE 2106-17 School Handbook

October 24 Week

2010 School Sprint Round (#1-30)

68

552.00

3

4000

39

7

4

4

36

135

1

3sqrt(10)

5

2205

22,000

60

32%

3/7

(2,4)

102

21

11/120

5/9

40

50

6sqrt(2)1/5

45

48

16

Warmup 5 (2012-13)

16

3/16

246

128

4

1236

130

13

12

9.8

Warmup 6 (2012-13)

7%

1/2

3

3/14

20

169

13

15

123

10

October 31 Week

2012 School Sprint Round (#15-30)

212

(-2,0)

4

729/1000

71

8/9

16 1/2

244

pi

15/14

18pi

37.5%

4

5

1/3

4

2012 School Countdown Round (#23-60)

16

125

16

120

17

11/32

3/8

4

1/729

4

50

29

1298

225

8

15

5.05

11

48,000

9

10

17

0

1650

6

62

65

18

4

13

60

6

-1/2

48

27

45

6

28

November 7 Week

2014 AMC8

A

E

B

E

C

D

B

D

D

A

A

B

D

B

C

B

B

D

A

B

A

E

A

C

B

Algebraic Expressions and Equations (2015-16 Playbook)

277

-800

1/6

$1.45

13

5

5

55

34

2

64,000

12

30.8

226

12

-68.75

65

4

11.1%

6

19

23

15

3

-5.6

2048

33/20

5

-3

16

Proportional Reasoning (2015-16 Playbook)

31.68

113

7.2

19.2

5940

20

3.04

1.25

17/14

64%

20

1/2

Number Theory (2015-16 Playbook)

13

32.28%

1 x 10^9

50

75

Monday

6

25

7.5

6

5

11/10

25

20

10

2016

7

547

​

 1617 HB WITHOUT SOLUTIONS (No Cover) - FINAL.pdf

​

--

Boyd Blackburn

LEAP Math Teacher and MathCounts Coach

Smith Middle School

Chapel Hill, NC

919-918-2145 x21802

bblac...@chccs.k12.nc.us

 

All mail correspondence to and from the Chapel Hill-Carrboro City Schools is subject to the North Carolina Public Records Law, which may result in monitoring and disclosure to third parties, including law enforcement.