Students+Contribution+Page

You may post interesting websites that help to explain Math concepts or share challenging Math puzzles and questions for your friends to answer. Please indicate your name after each posting.

Want to contest around the whole world for the fastest timing??? Try [|this Maths contest] to be the top and make Singapore proud //(just kidding)//!!!

//What "just kidding"???//

~Amanda Wow!!! ~Deepak Actually it's very easy. :) Try it yourself if you want to. ~Amanda

I tried it...actually, you will surely be the champion cause very few people play then only you'll be playing in that hour so...it doesn't really make Singapore proud, but thanks! It was fun!

-_-'' weili

[] ~ Jan Jay Wow, Jan Jay, thanks for posting the riddle. It was fun! ~Deepak Actually, poor people have at least something. Like, themselves. ~Amanda

Hi guys. Want to tease your brain with this cool Maths riddles? You will not stop laughing. Go on, click this link: [|Cool Maths Riddles] Posted by Deepak, 7th March 2011

Hey, Jan Jay here. I found a cool youtube video clip from Murderous Maths. It shows you some tricks about maths. The website is: [] Have fun!

Hi, I'm Amanda. I found this riddle from: [] The answer is actually in the website comments section. (So try to do the riddle before going to the website) Three men checked into a hotel. The room is $30 for the night, which they each split 10 dollars a person. They carry their stuff to their rooms and unpack. The bellboy comes knocking on the door shortly and says that the hotel accidentally overcharged them for the room. The actual room price is supposed to be $25, but the bellboy lets them know that the room is $27, and returns $3 back to the men. He keeps the other two dollars to himself. So if we do the math: $27 (for the room) + $2 (amount bellboy kept) = $29. What happened to the missing dollar?

Hello! I am Wei Li and I found this website on factors and multiples. http://www.helpingwithmath.com/by_subject/factors_multiples/factors_multiples.htm

Hello! I am Sarah. I found a website on factors and multiples:[|Factors and Multiples]

Hello everybody!! I am Aaron. i found something very interesting about a way to solve a very hard math question[|Extrodinary way to solve math] _ _ Hi everyone. The method Aaron found is cool! For 87*98, there is another quick method: 87*100=8700. 98 is 2 below 100, so 2*87=174. 8700-174=8526. But back to that method: if it's 69*189, how do we use that method? //~Amanda//

Maybe it is (70 X 189)-(1 X 189)? //~ Ian// What about (69 X 190)-(69 X 1)? ~ //Jan Jay// //Wait I prefer Ian's method it is easier to solve. do// //you think so?? As 70 ends with zero and 1// //times by a number is always that number// //easy as ABC!! ~Aaron Tan//

Well I'm talking about the method Aaron found/the one on youtube. Um...anyway if we use the method I suggested, if the ones digit is about 7-0, it will be easier. But actually also if its like, 72x103. How would you solve it? a) (70x103) + (2x103) //or// b) (100x72) + (3x72)? //~Amanda// I think I will solve it like (100x72) + (3x72) becuase 100 multiplied by any number is super easy. ~ //Jan Jay// I agree! //~Amanda//

Hi! Wei Li here, this website is about number patterns: http://www.mathsisfun.com/numberpatterns.html

Hello! I am Arielle. I found this youtube video on optical illusions ([]). There was one part of the video that gave a challenging puzzle: If a=b a2=ab a2-b2=ab-b2 (a+b)(a-b)=b(a-b) (a+b)=b a+a=a 2a=a 2=1 It sounds strange but it is true. There were no mistakes in the equation when I checked! See if any of you can figure out the one possible logical answer that can explain why this seemingly impossible statement can be true.

What is 1+1=? All of you would know that the answer is 2, but can you explain why? ~ Jan Jay S'cuse me,are you testing us the question that the most famous mathemathitions could not solve for ages? What is the question, exactly? ~Grace

The question is actually WHY people have invented 1+1 to be 2 and not 3 or 4 or any other number. It is a kind of question that has no answer, like 'Why is a tomato a tomato?' You might think the answer is 'Because it is a tomato!' But it doesn't make any sense, right? So the answer to why 1+1=2 is because it is made to do that. ~Jan Jay

But why is it made to do that? ~Sarah

Maybe it is because it is the order of numbers. For eg. why is 2 the number after 1? So I guess there isn't any answer. It is just... well... meant to be like that. ~ Ian

Another question: Why does the "gap" between two numbers have to be 'one'? ~Sarah

The question is ambiguous and unanswerable. Which two numbers? ~ Ian

Two consecutive numbers. ~Sarah

(Go to page history). Anyway, consecutive as in 1-2-3 or 0.1-0.2??? Answer is because I don't know. ~ Ian

Oh... ~Sarah