CLASS 6 MATHS// UNIT 4 // PART 8 // BRAIN TEASERS // RATIO, PROPORTION, UNITARY METHOD//

A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0. A proportion is an equation in which two ratios are set equal to each other. For example, if there is 1 boy and 3 girls you could write the ratio as: 1 : 3 (for every one boy there are 3 girls The equality of two ratios is called proportion. If a : b = c : d, we write a : b :: c : d and we say that a, b, c, d are in proportion. Here a and d are called extremes, while b and c are called mean terms. CLASS 6 MATHS// UNIT 4 // PART 8 // BRAIN TEASERS // RATIO, PROPORTION, UNITARY METHOD//