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This is posted by LL♪♫. The following is a question from cbox: A very large floor is tiled with black and white regular hexagonal tiles. Ea...

This is posted by LL ☺ Qn on cbox: There are two containers A and B. Each of them contains 9 white marbles, 9 black marbles and 9 red marb...

Someone needed help with the following question: The digits 1, 2, 3, 4 and 5 can form 120 five-digit numbers, each without any repeating di...

Someone posted the following question: All the 7-digit numbers containing each of the digits 1, 2, 3, 4, 5, 6, 7 exactly once, and not divi...

Someone posted the following question on the cbox: Find the 6-digit number ABCDEF such that 7 x ABCDEF = 6 x DEFABC where DEFABC is anothe...

This is posted by LL ☺ Someone posted the following question on the cbox: Container A contains 250 red marbles and 200 blue marbles. Cont...

Find the shaded area. Let the midpoint of line AD be E. (Centre of semi-circle). Let the arc of AC and AD cut at point F. AE = EF = 3.5...

Someone posted the following question on the cbox: Let AG be x cm. Then GB = 12-x Triangle AGF is similar to Triangle ABC, hence AG = GF...

Question 5: A company could use any of the 3 builder (Anthony, Bob and Charles) to build a wall. Anthony would take A days to build the wall...

Someone posted the following question on the cbox: A student divides an integer m by a positive integer n, where n<=100 and claims that ...

Another question posted on the cbox: A travelled from Town P to Q. B travelled from Town Q to P. They started at the same time. They met e...

Someone posted the following question from SMOPS 2010 in the cbox: s=1/((1/2001)+(1/2002)+(1/2003)+(1/2004)+(1/2005)+(1/2006)+(1/2007)+(1/...

This week's Columbus State University's Math contests are about number patterns. Problem of the Week: 0, -2, -2, 0, 4, 10, ___, ...

Someone posted a question (#18) from AMC10A on the cbox. It's easier and less messy to explain it here rather than on the cbox: Qn: Be...

The following is a good website for students who love to do interesting/challenging Math problems. http://www.colstate.edu/mathcontest/inde...

Another question posted on my blog: Jim bought some chocolates and gave half of it to Ken. Ken bought some sweets and gave half of it to Ji...

A PSLE student posted the following 2 questions on my cbox. I thought it is easier to explain it here than on the cbox. Here it is: Geom q...