Quantitative Ability – POINTS TO REMEMBER If an equation (i.e. f(x
... 3. For an equation f(x)=0 , the maximum number of positive roots it can have is the number of sign changes in f(x) ; and the maximum number of negative roots it can have is the number of sign changes in f(-x) 4. Complex roots occur in pairs, hence if one of the roots of an equation is 2+3i, another ...
... 3. For an equation f(x)=0 , the maximum number of positive roots it can have is the number of sign changes in f(x) ; and the maximum number of negative roots it can have is the number of sign changes in f(-x) 4. Complex roots occur in pairs, hence if one of the roots of an equation is 2+3i, another ...
Pre-Algebra, Unit 1: Variables, Expression, and Integers
... between absolute values and use the sign of the number with the greatest absolute value. Subtraction Rule 4: When subtracting integers, change the sign of the problem from subtraction to addition, change the sign of the subtrahend (second number), and use rules 1, 2, or 3 for addition of integers. A ...
... between absolute values and use the sign of the number with the greatest absolute value. Subtraction Rule 4: When subtracting integers, change the sign of the problem from subtraction to addition, change the sign of the subtrahend (second number), and use rules 1, 2, or 3 for addition of integers. A ...
Mar 2003
... 4. There are 99 3-digit numbers between 200 and 300. All 49 of the even numbers are divisible by the 2 in the hundreds place. All 10 of the numbers ending in 1 are divisible by that 1 and all 10 of the numbers ending in 5 are divisible by the 5. So far, at least 69 of the 99 3-digit numbers are div ...
... 4. There are 99 3-digit numbers between 200 and 300. All 49 of the even numbers are divisible by the 2 in the hundreds place. All 10 of the numbers ending in 1 are divisible by that 1 and all 10 of the numbers ending in 5 are divisible by the 5. So far, at least 69 of the 99 3-digit numbers are div ...
10 Rounding
... To round off to a decimal: 1. Check how many decimal places you need to round the answer to. a. The question may ask for 1, 2 etc decimal places. b. The question may ask for the nearest tenth, hundredth, etc. 2. Find this decimal place. 3. Look at the number in the next decimal place: a. If the numb ...
... To round off to a decimal: 1. Check how many decimal places you need to round the answer to. a. The question may ask for 1, 2 etc decimal places. b. The question may ask for the nearest tenth, hundredth, etc. 2. Find this decimal place. 3. Look at the number in the next decimal place: a. If the numb ...
Arithmetic
Arithmetic or arithmetics (from the Greek ἀριθμός arithmos, ""number"") is the oldest and most elementary branch of mathematics. It consists of the study of numbers, especially the properties of the traditional operations between them—addition, subtraction, multiplication and division. Arithmetic is an elementary part of number theory, and number theory is considered to be one of the top-level divisions of modern mathematics, along with algebra, geometry, and analysis. The terms arithmetic and higher arithmetic were used until the beginning of the 20th century as synonyms for number theory and are sometimes still used to refer to a wider part of number theory.