mefferts megaminx are available for $20.00 at www.cubeforyou.com.
there are lodes but i can name a few;tetraminx, pyraminx, pyramorphinx, megaminx, gigaminx, teraminx and petaminx.
You can buy the v-cube at www.v-cube.com
I dont think so but you can get them for cheep (around £5.99) on the internet.
The volume of a cube is L3. The volume of a sphere is 4/3 π r3 . If L=2r, Vcube=8r3. Comparing the volume of the cube with a side 2r and a sphere with a diameter of 2r where the r's are equal gives us: Vcube/Vsphere= (8r3)/(4/3 π r3 ) or (8x3)/(πx4) As π roughly equals 3 the equation simplifies to: Vcube/Vsphere=2 or a cube with its side equal to the diameter of a sphere has a volume approximately twice that of the sphere.
You find the length of one side and take it to the third power. Vcube = (length of side)3
i have found that the only place that will often have a megaminx is eBay. they are relatively low cost and, although often from out of the country, are nice quality compared to other eBay cubes. there were plenty when i purchased mine.
All you need is a graduated ruler to measure the length of one edge. From there one calculates the volume. For a cube, which has edges of equal length, you can find the the volume by cubing the length of an edge. Vcube = e3
The company Rubik's Cubes makes them, although their original creator was Erno Rubik.It must be noted that the Rubik's brand cubes are not preferred by speedcubers worldwide. There are many companies that produce speedcubes that are much cheaper than the original Rubic's Cube, yet are of a surprisingly high quality. A few examples of this are Cube4you, Maru, Edison, Da Yan, Sheng En, Diangshen, Shengshou, LanLan, Eastsheen, QJ, Vcube, WitEden, Ghost Hand
(7*7)-7+(7-7)+(7/7)=43(7*7)-(7+7)+(7/7)+7=43(7*7)+(7/7)-(7-7)-7=43(7*7)-7+(7/7)+(7/7)=43(7*7)+(7/7)+7-(7+7)=43(7*7)-(7-7)+7+(7/7)=43
............. .....777... ....7....... ...7......... ...7777.... ...7....7... ...7....7... ....777..... .............. Also: 7 - 7/7 And: 7/7 + 7/7 + 7/7 + 7/7 + 7/7 + 7/7
Oh, what a lovely little math problem we have here! Let's solve it together. First, we do the division and multiplication before addition and subtraction. So, 7 divided by 7 is 1, then times 7 is 7, and finally, minus 7 gives us a final answer of 7. Just like painting, sometimes we need to take it step by step to reveal the beauty of the finished masterpiece.