A Miscalculation #1

This calculator was purchased at Evergreen Office Supplies.  Smudge reprogrammed it so it gives incorrect answers.  Here are some sample answers:

20 ÷ 2 = 18

18 ÷ 2 = 16

18 ÷ 3 = 15

15 ÷ 3 = 12

What will happen when you enter 16 ÷ 4 = ?

a. 14

b. 13

c. 12

A Miscalculation #2

This calculator was purchased at Evergreen Office Supplies.  Smudge reprogrammed it so it gives the following answers:
5 - 1 = 6
5 - 2 = 7
5 - 3 = 8
6 - 1 = 7
What will be the answer if you enter 4 - 3 = ?

a. 7
b. 8
c. 9

A Miscalculation #3

This calculator was purchased from PDQ Drug Store. Sludge reprogrammed it so it gives incorrect answers:
2 x 2 = 14
2 x 3 = 16
3 x 2 = 16
3 x 3 = 19

What will happen when you enter 4 x 2 = ?
a. 19
b. 18
c. 17

A Miscalculation #4

This calculator was purchased from PDQ Drug Store.  Sludge reprogrammed it so it gives incorrect answers:
1 + 2 = 5
2 + 3 = 8
1 + 3 = 7
2 + 2 = 6

What will this calculator show when you enter 3 + 3 =
a. 8
b. 9
c. 10

MC2C

9 is not the answer this calculator will give.

Return to the problem and try again.
(Use the back button on your browser.)

MC1B

13 is not the answer this calculator will give.
Go back and try again.

MC2A

That is correct!  You can now fix this calculator.
Move on to the next problem.

MC4A

8 is not the answer this calculator will give.

Use the back button on your browser to return to the problem.



MC3C

17 is not the answer this calculator will give.
Use the back button on your browser to go back.

MC1A

14 is not the answer this calculator will give.

Use the back button on your browser to try again.

MC2B

8 is not the answer this calculator will give.

Use the back button on your browser to try again.

MC3A

19 is not the answer this calculator will give.

Use the back button on your browser to return to the problem.

MC4B

Correct!
You can now fix this calculator.

Bonus Question:

Where are Sludge and Smudge?

Answer in the comments.

For other Math Spy Missions click here.

MC1C

Good job!  Now you can fix this calculator.

Move on to the next problem.

MC3B

Good job!
Now you can fix this calculator.
Move on to the next problem.

MC4C

10 is not the answer this calculator is giving.
Use the back button on your browser to go back.

The Pool Problem Revisited #1

Attention Math Spies and Recruits!


Smudge has driven his truck through the fence at Math Spies Headquarters.  He drove across the patio cracking some of the cement tiles and poured cement into the pool filling it 3/4 of the way.
You will have needed to work through the original Pool Problem to solve the problems here.
How much cement did Smudge use to fill the pool 3/4?
a. 2130 cubic feet
b. 2205 cubic feet
c. 552 cubic feet
d. 545 cubic feet
e. I don't remember the first Pool Problem.  (Take notes and come back here.)

The Pool Problem Revisited #2

Smudge drove his truck across the patio cracking 1/4 of the tiles.
How many cement tiles will need to be replaced?


a. 184 cement tiles
b. 186 cement tiles
c. 245 cement tiles
d. 250 cement tiles
e. I don't remember the original Pool Problem. (Take notes and come back.)

The Pool Problem Revisited #3

When Smudge drove his truck onto the patio, he knocked out 24 feet of fencing.
How much fencing is still standing?

a. 200 feet
b. 220 feet
c. 172 feet
d. 144 feet
e.  I don't remember the original Pool Problem. (Take notes and come back)

PPR2B

Smudge's truck broke more than 186 tiles.
Go back and try again.

PPR2D

Smudge's truck didn't break 250 cement tiles.
Go back and try again.

PPR3A

Nice calculations!  Only 200 feet of the fence is still standing.


The next question is a different type.  If you are a true Math Spy, and have solved all the missions so far, you will know where Smudge is hiding.  For a clue, solve this secret message.

Where is Smudge?  (Type your answer in the comments.  You may answer anonymously.  No personal information is collected by Math Spies.)

For other Math Spy Missions click here.

PPR 3B

Less than 220 feet of fencing is still standing.


Go back and try again.

PPR1A

2130 cubic feet of cement is not 3/4 the volume of the the pool.
Use the back button on your browser to try again.

PPR 3C

More than 172 feet of fencing is still standing.


Go back and try again.

PPR1B

You are absolutely correct!  It takes 2205 cubic feet of cement to fill the pool 3/4 of the way.
Go to the next problem.

PPR1D

545 cubic feet of cement is not enough to fill the pool 3/4 of the way.
Use the back button on your browser to return to the problem.

PPR3D

More than 144 feet of fencing is still standing.
Go back and try again.

PPR 1C

552 cubic feet of cement will not fill the pool 3/4 of the way.
Use the back button on your browser to go back to the problem.

PPR2A

Use the browser button to go back.

Smudge's truck broke more than 184 tiles.

PPR2C

Good job! Smudge's truck broke 245 tiles.
Go to the next problem.

Intercepted Message

Attention Math Spies and Recruits:
This message was intercepted between known members of an enemy organization called Stop Thinking Intelligently Now Corporation (S.T.I.N.C.)  Please help us by deciphering the message.
Thank you.


A=25

17-11-19-2-5-3  6-25-17  25  18-21-7-12  26-16-13-18-6-3-16  12-25-11-3-2  17-10-19-2-5-3.