We cannot take half of 9 people. The even numbers, then, are the numbers divisible by 2: 2, 4, 6, 8, and so on. The odd numbers are 1, 3, 5, 7, and so on. If you do not know half of some even number, you can find it by decomposing it mentally into two even numbers whose half you do know.
To draw a shape, line or angle accurately using a compass and straightedge (ruler). Sometimes you are also allowed to use a protractor and triangle.
Math Symbols Mathematics is an exact science where there is no margin for error no matter how minute. Mathematics is generally an abstract study of space, quantity, change and structure. It is the science that resolves âwhat is trueâ or âwhat is falseâ, with the use of formulations and patterns.