brain

1. Brain Plus IQ

This was once as soon as as swiftly as briskly as swiftly briskly as when terribly compelling immoderate-excessive-significant for Conifer State in my existence these reasonably first ambitions succeeded in getting such virtuoso recommendation nonetheless indubitably moderately and no longer...
2. Brain Blip - Riemann Sums Question

What is my attempt to use Riemann Sums missing here? Evaluate using Riemann Sums. \int_{4}^{10}6dx. Obviously, the answer is just 36 as the integral can be interpreted as a 6x6 square. My attempt to get this using Riemann Sums, though, is not working. What do I do next? [Also, any advice on...
3. I like math, but my brain doesn't do it right. Any suggestions?

So here's the deal. I struggled a LOT in math during high school (I failed grade nine, and it took private tutoring just to pass grade eleven with a C). I've since gotten a lot better at math. My analytical and logical thinking skills improved substantially during my first few years of...
4. dont have enough brain to solve a calc problem

Joe is on the bank of a river that is 50 m wide and he wants to reach a point, P, located 400 m downstream on the other side. Joe can swim 5/4 m/s and run 13/2 m/s, and he will swim diagonally across the river to a point Q and then run along the (straight) river bank to P. In this question, we...
5. Brain twister????

2+3=8, 3+7=27, 4+5=32, 5+8=60, 6+7=72, 7+8=?? Solve it?
6. Mathematics on the brain.

Have a look at this story.
7. Brain Teaser

I have no idea what to do... enlighten me if you can , please and thank you.
8. initial-value problem and integrating..... my brain just isn't grasping help

Hi, i have this initial-value problem....i need to use the reverse quotient rule, but i also need to use an integration formula too: dy/dx= (cos(5x))/(7+sin(5x)) when y=6 when x=0 f'(x)/f(x)dx=in(f(x))+c (f(x)>0) i don't want the answer i would just like to know how??? if that makes sense...
9. brain teaser optimization problem

find the maximum length of the red ribbon around the present
10. brain freeze on this

A mass of 0.5 kg is suspended from a flywheel as shown in FIGURE 2. If the mass is released from rest and falls a distance of 0.5 m in 1.5 s, calculate: (a) The linear acceleration of the mass. (b) The angular acceleration of the wheel. (c) The tension in the rope. (d) The frictional torque...
11. Difficult brain teaser - mix of algebra, number theory and maybe s.o.

Hi there, I put up an very interesting question from a mathematical magazine, but I was not able to solve it: There are n bottles arranged in a circle. You can start at any bottle and lay one litte stone inside this first bottle. Then you will go to the next bottle and lay a little stone in...
12. WHOS got the trig brain for this one?????

for each of the sinusoidal equations a) state the mapping rule B) use the mapping tecnique to build a table of values for each function. for the basic function, y = sin x use values of x = 0 degrees, 90, 180, 270, 360 degrees. then use your mapping to build the table for the functions. c)...
13. Brain Teaser Posted

LOGIC: If you count from 1 to 100, how many series of 7's and how many 7's will you pass on the way? A friend posted this brain teasser and was wondering if someone here can explain it in Lamen's terms as if I was 7 years old. LOL I know the how many 7's i pass between 1 to 100. Its 20...
14. [Brain teaser(torturer)]My TA and Prof says this is "easy", can you figure it out?!

Make the following true without doing ANYTHING but adding parentheses. No rebalancing, no switching operators, etc. m=109 s=115 s = 4 / m + m * m - 7 * 2 / 3 A few of you might realize this is not actually an Algebra problem, it's from my computer science homework, but since it deals with...
15. Spare time brain teasers

Hello everyone. I'm here because I have a good interest in Math/Physics but I'm struggling to find things to solve when I have spare time at work. At work I get a lot of free time away from a Computer, So I get bored very easily. My main question is asking you guys if there are any Math related...
16. Help - Brain Teaser

Hello fellow puzzle solvers I saw this puzzle the other day that grabbed my interesting but I have no idea how to solve it. Puzzle Name - Another Carton It has been reasonably argued that the treasure will NOT be found at any of the following coordinates 489655,128130 428381,114675...
17. 1 equation 1 unknown but still killing my brain

hi all. i have the following equation and am not sure how to solve it. it seems so simple but i haven't done math in a while and am not sure the steps to solve this. I can create a number close enough using excel to solve it through trial and error which is enough to tell me that it is possible...
18. 3 Integrals that fried my brain :(

I've been staring at them for 2 hours scribbling and I just can't figure them out ...(Worried) First make a substitution and then use integration by parts to evaluate the integral. 1. Evaluate the integral. 2. Evaluate the integral. 3.
19. Table of figures, finding new revenue, very short but difficult brain teaser

Student discount price: $4 Normal price:$7 Multiple Choice Question: If the club offered no discount for students and consequently the number of students attending dropped by 10%, what would be the new revenue created for Jan? Choice of answers: A) $80,900 B)$92,000 C) $122,600 D)$104,000...