Mathematics

Solved! Maths question set for teenagers that baffled the world is finally answered

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It was set as a maths problem, aimed at testing the logical reasoning skills of 14-year-olds in Singapore. But the question went viral after people across the world were left completely baffled. The problem, which tests logical reasoning, has been shared thousands of times online as people have tried to pose their best explanations of

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Classwork Series and Exercises {Mathematics- SS2}: Approximation and Percentage Error

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Introduction Sometimes we do not need to measure of calculate things exactly. We may only wish to have a rough idea, or to calculate only to a certain degree of accuracy. It is in such cases we talk of decimal places, significant figures or rounding off to the nearest unit, tens, etc. When this happens,

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Classwork Series and Exercises {Mathematics- SS3}: Word Problem Involving Quadratic Equations

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Word Problem Involving Quadratic Equations Write a “let” statement and equation for each example. Explain the difference. Find two consecutive integers whose sum is 13 Let x = first integer x + 1 = second integer x + x + 1 = 13 Find two consecutive two consecutive integers whose products is 42 Let x

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Classwork Series and Exercises {Mathematics- JSS2}: Approximation and Estimation

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Rounding off numbers To ’round off’ or ‘approximate’ a number to a desired degree of accuracy, we round the number up if the next digit is 5 or more round the number down if the next digit is less than 5. We represent approximately equal to as and approximately as ‘~’ Examples: 73 is close to 70 if approximating

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Classwork Series and Exercises {Mathematics- JSS1}: Directed Numbers

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Adding and subtracting directed numbers Numbers can be shown on a number line which extends above and below zero. This gives positive and negative numbers. The signs + and – show the direction from 0. Positive and negative numbers are called directed numbers. To add a positive number, move to the right on the number

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Classwork Series and Exercises {Mathematics- SS2}: Linear and Quadratic Solution by Substitution Method

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Introduction The method of solving “by substitution” works by solving one of the equations (you choose which one) for one of the variables (you choose which one), and then plugging this back into the other equation, “substituting” for the chosen variable and solving for the other. Then you back-solve for the first variable. Solve the

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