Fun Math Question. Figure I share

[Suiram]

Okay, for Naramaska's I got:

7428

If that's right, I'll explain how I got that lol

[Naramaska]

Okay, for Naramaska's I got:

7428

If that's right, I'll explain how I got that lol

Spot-on :D

[Daydreamer]

Damn I don't know what the hell I did. I got a freaking negative...

[Suiram]

Should I explain? The explanation I wrote up uses Code function so I realized in preview that I can't really post it without spoiling for others lol

Edit: Well, here it is just poorly formatted lol

Okay, what I did was, I realized it was a repeating pattern. If you let [/size=150]b[//size]n = [/size=150]a[//size]1 + [/size=150]a[//size]2 + ... + [/size=150]a[//size]n, then it repeats like this:

[/code]As Bs step
a1 a1 1
a2 a1+a2 2
-a1+a2 2*a2 3
-a1 -a1+2*a2 4
-a2 -a1+a2 5
a1+-a2 0 6[//code]

So since 1807 = 1 mod 6, then [/size=150]a[//size]1807 = 1807 = [/size=150]b[//size]1 = [/size=150]a[//size]1
1907 = 5 mod 6, so 1907 = [/size=150]b[//size]5 = -1807 + [/size=150]a[//size]2, so [/size=150]a[//size]2 = 3714
2007 = 3 mod 6, so [/size=150]a[//size]2007 = 2*[/size=150]a[//size]2 = 3714*2 = 7428

[Daydreamer]

Should I explain? The explanation I wrote up uses Code function so I realized in preview that I can't really post it without spoiling for others lol

Edit: Well, here it is just poorly formatted lol

Okay, what I did was, I realized it was a repeating pattern. If you let [/size=150]b[//size]n = [/size=150]a[//size]1 + [/size=150]a[//size]2 + ... + [/size=150]a[//size]n, then it repeats like this:

[/code]As Bs step
a1 a1 1
a2 a1+a2 2
-a1+a2 2*a2 3
-a1 -a1+2*a2 4
-a2 -a1+a2 5
a1+-a2 0 6[//code]

So since 1807 = 1 mod 6, then [/size=150]a[//size]1807 = 1807 = [/size=150]b[//size]1 = [/size=150]a[//size]1
1907 = 5 mod 6, so 1907 = [/size=150]b[//size]5 = -1807 + [/size=150]a[//size]2, so [/size=150]a[//size]2 = 3714
2007 = 3 mod 6, so [/size=150]a[//size]2007 = 2*[/size=150]a[//size]2 = 3714*2 = 7428

Bah, I actually did most of it right, I was just starting my loop in the wrong spot for some odd reason so my answer ended up negative.

I don't feel so bad now.

[Amele]

prepositions are fun! obviously 0. (the "straight" answer is 7*2(girls) + 7*7*7*4(small cats) + 7*7*4 (big cats) = 1,582)

you missed a step like Epical.

yeah. my calculator failed too. (I dropped a 7 doing small cats and it propagated through to my big cats, since all I did was drop a 7) I still maintain the answer is 0 though.

the question specifically states the girls are 'on the bus' and then asks how many legs are 'in the bus'.

[Khamsin]

This isn't really a "math puzzle", it's just a random question:

A car is traveling at 60mph down a 5% grade until the driver suddenly hits the brakes, skidding 300 feet and crashing into a wall.

If the coefficient of friction of the skidding vehicle on the pavement is 0.3, how fast was the car going just before it crashed?

(5% grade means a hill such that for every 100 feet forward, you go 5 feet down).

[Saga]

prepositions are fun! obviously 0. (the "straight" answer is 7*2(girls) + 7*7*7*4(small cats) + 7*7*4 (big cats) = 1,582)

you missed a step like Epical.

yeah. my calculator failed too. (I dropped a 7 doing small cats and it propagated through to my big cats, since all I did was drop a 7) I still maintain the answer is 0 though.

the question specifically states the girls are 'on the bus' and then asks how many legs are 'in the bus'.

2. the bus driver's legs!

[Khamsin]

prepositions are fun! obviously 0. (the "straight" answer is 7*2(girls) + 7*7*7*4(small cats) + 7*7*4 (big cats) = 1,582)

you missed a step like Epical.

yeah. my calculator failed too. (I dropped a 7 doing small cats and it propagated through to my big cats, since all I did was drop a 7) I still maintain the answer is 0 though.

the question specifically states the girls are 'on the bus' and then asks how many legs are 'in the bus'.

2. the bus driver's legs!

No driver. They're ghost riding the school whip.

[souleman]

How many seats are on the bus? Because each seat has 4 legs also...

[Saga]

prepositions are fun! obviously 0. (the "straight" answer is 7*2(girls) + 7*7*7*4(small cats) + 7*7*4 (big cats) = 1,582)

you missed a step like Epical.

yeah. my calculator failed too. (I dropped a 7 doing small cats and it propagated through to my big cats, since all I did was drop a 7) I still maintain the answer is 0 though.

the question specifically states the girls are 'on the bus' and then asks how many legs are 'in the bus'.

2. the bus driver's legs!

No driver. They're ghost riding the school whip.

while thizzing?

[Amele]

How many seats are on the bus? Because each seat has 4 legs also...

depends on how the seats are structured. my school used buses with solid walls rather than legs, so 0 legs per bus seat.

[Khamsin]

What if they're serial killer girls, and carry around the dismembered legs of their victims, after having fed the rest to their cats?

[aers]

Uh guys it's 0, the girls are on the bus and it's asking how many legs are in the bus. 8)

(i know, i know, i'm joking)

[Zanz L. Barre The 3rd]

So i get this e-mail at work from the girls in the office with this question.


There are 7 girls on a bus
Each girl has 7 backpacks
in each backpack, there are 7 big cats
for every big cat there are 7 little cats.

Question: How many legs are there in the bus???


This is NOT a trick question. PM me your answer instead of posting it. I want to see how many people can get this question. It took me 5 min to figure it out as I didn't get it right away.

If you want to post the answer go head but if you want to keep people in suspense you can PM me your answer and I will let you know if your right. lol.

also. THERE IS no bus driver lol. have fun guys.

woops im a dumbass lol

[aurik]

This isn't really a "math puzzle", it's just a random question:

A car is traveling at 60mph down a 5% grade until the driver suddenly hits the brakes, skidding 300 feet and crashing into a wall.

If the coefficient of friction of the skidding vehicle on the pavement is 0.3, how fast was the car going just before it crashed?

(5% grade means a hill such that for every 100 feet forward, you go 5 feet down).

I would treat this as a conservation of energy problem:
Initial energy = 1/2*m*v^2 + m*g*h (h=15 feet)
Final energy = 1/2*m*v^2 = initial energy - energy dissipated by skid
energy dissipated by skid = drag force * distance = friction coefficient * normal force of the car (m*g*cos(5)) * distance