The Monthy Hall problem is a maths problem that is easy to understand but the solution isn’t so intuitive. The problem is as follows: Suppose you’re on a game show, and you’re given the choice of three doors: Behind one door is a car; behind the others, goats. You pick a door. The host, who[…]
Some questions are quite creative. They are original and force you to think. “Four children decided to find out their total mass. As they did not want their friends to know their individuals mass, the children decided to weigh themselves 3 persons at a time. Although the children tried all possible ways of grouping themselves[…]
Maths tip: Some questions seem so convoluted it makes you wonder who invents these. They are unfortunately part and parcel of the examination process so we can only fold up our sleeves and get down and dirty with them. Here’s one example: “Jamie spend $6 less than 4/7 of her money on a dress. She[…]
Revision tips Revise the following concepts – they are critical: Fractions, ratios and percentages Geometry – area and circumference of circle, breaking down a composite figure into circle, square, triangle, volume of cube and cuboid. Find unknown angles in squares, rectangles, parallelograms, rhombus, trapezium and triangles. Speed Algebra – representing an unknown with a letter,[…]
Maths tip: I got several questions on patterns. Here are some examples, hope they help!
Maths tip: Here’s an interesting question from one reader. It involves recognising a pattern and extrapolating from there. The pattern may not come easily at first – so try to draw it out and analyse. The question is "A teacher arranged thirty pupils to stand in a row, starting from Number 1 to Number 30.[…]
Maths tip: Many difficult problems can be solved with the "make a supposition" method. It is a very powerful, easy-to-use method. It is very useful for problems where you need to solve for two unknown quantities. Sometimes: – Total is given, Difference is given. – Total is given, Average is given. – Two scenarios are[…]
Maths tip: Here’s a challenging area question.
Maths tip: Qn: If Sally works together with Amanda, they will take 10 days to produce an art piece. If the two girls first work together for 4 days, followed by Sally working alone for 10 days, Amanda will take 5 days to complete the remaining work. How long will each girl take to produce[…]
Maths tip: Here’s another challenging maths question. Solving by algebra is hard too! Let’s try other methods of solving it 🙂