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moneybird:
Group Title
Does helping others on this website consider as "extracurricular"?
 updated 11 months ago
 13 replies
 4 Medals
Mathematics

moneybird:
Group Title
An auditorium has a rectangular array of chairs. There are exactly 14 boys seated in each row and exactly 10 girls seated in each column. If…
 updated 2 years ago
 3 replies
 16 Medals
Mathematics

moneybird:
Group Title
Compute
\[\int\limits_{}^{}\frac{dy}{1+\cos(4y)}\]
 updated 2 years ago
 1 reply
 No Medals Yet
Mathematics

moneybird:
Group Title
Suppse that \[f(n)=2n\lfloor \frac{1+\sqrt{8n7}}{2} \rfloor\] and \[g(n)=2n\lfloor \frac{1+\sqrt{8n7}}{2} \rfloor\] for each positive int…
 updated one year ago
 2 replies
 No Medals Yet
Mathematics

moneybird:
Group Title
Grade 10 Cayley #25
The digits of the positive integer n include no 9s, exactly four 8s, exactly three 7s, exactly two 6s, and some other d…
 updated 2 years ago
 1 reply
 2 Medals
Mathematics

moneybird:
Group Title
Six friends will exchange books in their book club. Each friend has one book to give to a friend, and will receive one book from a different…
 updated 7 months ago
 16 replies
 2 Medals
Mathematics

moneybird:
Group Title
AMC 10 2012 #24
Let a, b, and c be positive integers with \[a \ge b \ge c\] such that \[a^2b^2c^2+ab=2011\] and \[a^2+3b^2+3c^23ab2ac2…
 updated 2 years ago
 1 reply
 6 Medals
Mathematics

moneybird:
Group Title
Is a famous person's quote an example of allusion?
 updated 2 years ago
 4 replies
 4 Medals
Mathematics

moneybird:
Group Title
What is the ordered pair of positive intgers (a,b) for which a/b is a reduced fraction and \[x = \frac{a \pi}{b}\] is the least positive s…
 updated 2 years ago
 3 replies
 1 Medal
Mathematics

moneybird:
Group Title
What is the largest value of "x" (in radians) less than pi satisfying the equation: cos x = cos (6x)
 updated 2 years ago
 14 replies
 5 Medals
Mathematics

moneybird:
Group Title
What is the ordered pair of positive intgers (a,b) for which a/b is a reduced fraction and \[x = \frac{a \pi}{b}\] is the least positive sol…
 updated 2 years ago
 15 replies
 6 Medals
Mathematics

moneybird:
Group Title
What software do you use to write math proofs and stuff?
 updated 2 years ago
 14 replies
 5 Medals
Mathematics

moneybird:
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Polygon inscribed in circle!
 updated 2 years ago
 6 replies
 4 Medals
Mathematics

moneybird:
Group Title
Perfect power question
 updated one year ago
 7 replies
 2 Medals
Mathematics

moneybird:
Group Title
Two different circles that pass through the point (1,3) are tangent to both coordinate axes. If the length of the radius of the smaller circ…
 updated 2 years ago
 3 replies
 3 Medals
Mathematics

moneybird:
Group Title
Find the nonnegative number of c.
 updated 2 years ago
 4 replies
 2 Medals
Mathematics

moneybird:
Group Title
Can humans and dogs mate?
 updated 2 years ago
 7 replies
 4 Medals
Mathematics

moneybird:
Group Title
Easy circle question
Two different circles that pass through the point (1,3) are tangent to both coordinate axes. If the length of the radiu…
 updated 2 years ago
 1 reply
 2 Medals
Mathematics

moneybird:
Group Title
(a) Show that if triangle ABC is equilateral, then for any point P in the interior of triangle ABC, the line segments PA, PB, and PC can be …
 updated 2 years ago
 2 Medals
Mathematics

moneybird:
Group Title
Find all integers n such that (28.5)^n + (99.5)^n is an integer.
 updated 2 years ago
 18 replies
 6 Medals
Mathematics

moneybird:
Group Title
Question time
 updated 2 years ago
 25 replies
 8 Medals
Mathematics

moneybird:
Group Title
In triangle ABC, BC = a, AC = b, AB = c, and a < (b+c)/2. Prove that angle BAC < (angle ABC + angle ACB)/2.
 updated 2 years ago
 39 replies
 4 Medals
Mathematics

moneybird:
Group Title
If frac{a}{b} = frac{c}{d}, then prove that frac{a+kc}{b+kd} = frac{a}{b} where k can be all real numbers.
 updated 2 years ago
 6 replies
 5 Medals
Mathematics

moneybird:
Group Title
Denote by pk the kth prime number. Show that p1p2...pn +1 cannot be the perfect square of an integer.
 updated 2 years ago
 8 replies
 4 Medals
Mathematics

moneybird:
Group Title
"a" Adults and "k" students are trying to cross a river with a raft. However the raft can carry only 1 adult at a time, or 2 students, or 1 …
 updated 2 years ago
 8 replies
 3 Medals
Mathematics

moneybird:
Group Title
A pattern of Figures is shown below. Figure 1 is a regular pentagon with side length 1. Figure 2 is a regular pentagon of side length 2 draw…
 updated 2 years ago
 32 replies
 5 Medals
Mathematics

moneybird:
Group Title
If y / (xz) = (x + y) / z = x / y for three distinct positive numbers x, y, and z, find x / y.
 updated one year ago
 3 replies
 2 Medals
Mathematics

moneybird:
Group Title
1. values of x, which f(x) has local minimum.
2. local maximum
3.absolute minimum…
 updated 2 years ago
 38 replies
 3 Medals
Mathematics

moneybird:
Group Title
Look at interval [0,8] of graph from the following link:
http://www.flickr.com/photos/57417292@N03/6335164067/
1. For what values of x does…
 updated 2 years ago
 22 replies
 5 Medals
Mathematics

moneybird:
Group Title
If a and b are positive numbers, find the maximum value of f(x)=x^a*(1x)^b, 0 less than or equal to x less than or equal to 1.
Your answer…
 updated 2 years ago
 6 replies
 4 Medals
Mathematics
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