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# Math can be fun!

### Gamer Talk

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doctor_wu wrote:
Scintillae wrote:

I'm having more fun with this than I should.

The hill you are standing on is 40 feet tall. The goblins are standing at the bottom of the hill, 30 feet away. If you roll a cannonball at them to go bowling for XP, what is the distance the ball will travel?

I don't think 8th graders can do line integrals which you would need to calcuate exactly and we would need a shape to go on the curve Hills are not usually stight and linear. You can calculate the distance from the starting point though.

Let's allow the goblins time to dig a curved, descending trench

down which they can roll the cannonball at you. What is the shape of
the trench they should dig, so the cannonball hits you in the least
amount of time? (assuming constant gravity.. ::looks at the wizard)

.

 1 person marked this as a favorite.
Electric Wizard wrote:
Scintillae wrote:
The goblins are standing at the bottom of the hill...

Let's allow the goblins time to dig a curved, descending trench

down which they can roll the cannonball at you. What is the shape of
the trench they should dig, so the cannonball hits you in the least
amount of time? (assuming constant gravity.. ::looks at the wizard)

Opposite gravity? And how are they going to dig a descending trench up the hill, exactly?

doctor_wu wrote:
Scintillae wrote:

I'm having more fun with this than I should.

The hill you are standing on is 40 feet tall. The goblins are standing at the bottom of the hill, 30 feet away. If you roll a cannonball at them to go bowling for XP, what is the distance the ball will travel?

I don't think 8th graders can do line integrals which you would need to calcuate exactly and we would need a shape to go on the curve Hills are not usually stight and linear. You can calculate the distance from the starting point though.

...That is a problem assuming a right triangle. It's the Pythagorean theorem where the distance the ball would roll makes the hypotenuse. Pretty sure an eighth grader can handle it.

 RPG Superstar 2010 Top 16

You might want to check the common core state standards to see what's grade-level appropriate.

The 4-sided dice in Dragon Dice meet two of the three conditions: all the sides are the same shape -- that is, "congruent", and all the vertices connect three triangles. But the triangles aren't equilateral.

The follow-up question: why can't you have a Platonic solid where 3 hexagons meet at every face? Or three octagons? Or four squares or pentagons?

How well does she work with negative numbers?

Problem 1: A character is dead when their hit points are less than or equal to the opposite of the Constitution score (e.g. a character with a Con of 12, would be dead if they have less than or equal to -12 hit points).

If a character has 4 hps and is hit and loses 10 hit points. Will the character be dead?

Problem 2: The ability modifier is calculated by subtracting 10 from the ability score, then dividing the difference by 2. The ability modifier is the largest integer less than or equal to the result.

What is the ability modifier for an ability score of 7?

rpgsavant wrote:

So I've been trying to change my daughter's opinion about math. She has always believed that math is boring and nothing but numbers. I believe Pathfinder is the way I can change her mind. So I started giving her word problems.

Shivira is a level 2 ranger. She shoots a goblin with her longbow. She needs to hit armor class 15. Her bonus to hit is +6. What is the number you need to roll on a D20 to hit the goblin? x+6=15 x=9

Shivira rolls a Natural 20 to hit the goblin! What number does she need to roll to confirm the critical? x=9

How many what is the minimum damage Shivira will do on her critical if she is within 30 feet with Point Blank Shot? What is the maximum? 3(1)+1=x
3(8)+1=x Range is 4-25 damage.

She really enjoyed that and didn't even realize she was doing Pre-algebra when I did it.

So help me out. Let's hear some more word problems! Make them as complicated as you like.

Shavira needs to but a potion. The stingy shopkeep is charging 97 gp. Shavira is broke and borrows 50 gp from Dagna and 50 gp Meepo. She buys the potion, repays Dagna 1 gp, repays Meepo 1 gp, and keeps 1 gp for herself (girl's gotta eat!). She now owes Dagna 49 gp, and owes Meepo 49 gp. Where did the extra gp go? (49 owed+ 49 owed + 1 kept = 99)

 1 person marked this as a favorite.

Also, at first, I thought this thread title was "Meth Can Be Fun"

It wasnt what I was expecting.

Pathfinder Companion Subscriber

The human rogue Mystery and her apprentice, a halfling named Thick-Fingered Tom, sneak into a noble's house to steal the family heirloom. They think it's in one of two chests, both of which are locked. Picking either lock will require a DC 20 disable device check.
1. Mystery has a disable device modifier of 12. How likely is she to pick one of the locks each time she tries?
2. Thick-Fingered Tom only has a modifier of 4. How likely is he to pick one of the locks each time she tries?
3. From what they know about the guards' patrol routes, Mystery and Tom think they need to open both chests on their first three tries to have a chance of finding the heirloom and escaping alive. If the chests are so far apart that Mystery has to handle one and Tom has to handle the other, how likely are they to succeed?
5. Assume that Tom wanted to impress mystery so much that he spent weeks practicing his lock-picking before the mission and increased his disable device modifier from 4 to 8. How will that affect their odds of opening both chests in three rounds?
6. Assuming that Tom didn't practice and getting caught might lead to lifelong imprisonment, should Mystery have chosen a different companion for this mission?

Chris Mortika wrote:
You might want to check the common core state standards to see what's grade-level appropriate.

I subbed in an eighth grade math class earlier this week. They were actually having a test over it. =)

How well it went?

I dunno. Teacher didn't leave a key, so I couldn't grade it, but they didn't have too many questions, so I'm under the impression they did pretty well.

Or were so baffled by it they could not determined their question afterwards.

Or were too shy of asking question to a substitute teacher.

I doubt it - I've never had a shy class at that school.

Anyway.

Kalisa is the royal gardener and is very sick of those durned fey getting into her lord's vegetable patch. She has obtained permission to replace her wooden fencing with cold iron. If each 1-foot segment costs 50gp, and her garden is a 15-foot by 12-foot rectangle, how much will it cost to keep her veggies safe?

rpgsavant wrote:
DeathQuaker wrote:

Now, I think using creative methods to help teach mathematics is a good idea. And I can say as someone who has some numeric processing impairments (nothing on the level of a disorder, at least not a severe one, but those parts of my brain, the gears do not turn well), stuff like RPGs have helped me learn some mathematics tricks. RPGs have especially helped me practice arithmetic, which I do not have a natural talent for.

I'm not disappointed at all actually, and I don't mind the cautionary criticism either. We adopted her from the DHS system. If you've never heard horror stories about problems that DHS kids have, she's basically like a prisoner who's seeing the outside world for the first time. We're breaking those bad habits that have been instilled in her. One of those bad habits is the thought that school is bad. She doesn't try because she hates being in school. So I'm trying to show her, through a hobby that she really enjoys, that math doesn't have to be boring. What I am trying to separate is the school from the education. Just because you hate school does not mean that learning cannot be interesting. She tells me all the time that she learns more from me when I help her with homework than she does in class. It's because I make learning fun.

I want to first say that you are an awesome human being and the world needs more of you.

Now here's my simple word problem:

You are playing a 10th level fighter. Equip your character. You have 62,000 gold pieces to use.

Electric Wizard wrote:
Scintillae wrote:
The goblins are standing at the bottom of the hill...

Let's allow the goblins time to dig a curved, descending trench

down which they can roll the cannonball at you. What is the shape of
the trench they should dig, so the cannonball hits you in the least
amount of time? (assuming constant gravity.. ::looks at the wizard)
Opposite gravity? And how are they going to dig a descending trench up the hill, exactly?

.

Because the Goblins are on top of the hill. Obviously the OP has it backwards.
Otherwise with the Goblins at the bottom of the hill they would just lay
siege to the hill and wait for you to starve. duh.

But let's assume idiocy as you suggest, and place the Goblins at bottom
of the hill. Then, (they would *not* employ a wizard to reverse gravity)
they would lay siege to the hill and wait for you to starve.

Gah. Public schools.

.

Here's one:

Jimmy the gamer is unhealthy. He needs to lose 100lbs in 19 weeks or he'll die
of diabetes.

How many calories can he eat per day to achieve this (and keep his foot)?

.