You've already seen the wonderful factor table - a simple technique for finding all the factors of an integer. Let's see how we use the chart to deal with this question: How many positive factors does 140 have? The question asks about factors, so the factor table is...
Some integer questions may require you to find the Factors of an integer. The factor table is a basic technique for finding all the factors of any integer. This technique can also be useful for questions asking how many factors a particular integer has. The technique...
Primes play a central part in integer questions. Overconfidence is dangerous here: while almost everybody can recite the definition of a prime number at the drop of a hat, the field is actually rife with misconceptions. We are here to make sure you know everything...
Let's formulate rules for addition, subtraction, multiplication, and division of Even and Odd numbers. Here are the rules for adding / subtracting even and odd numbers: Even ± Even = Even (e.g. 2 + 2 = 4; -4 - 2 = -6) Odd ± Odd = Even (e.g. 1 + 1 = 2; -31 - 1 = -32)...
We'll begin with the basic definitions: Even: any integer that is divisible by 2. Examples: 2, 4, 14. Odd: any integer that is not divisible by 2, i.e. leaves a remainder of 1 when divided by 2. Examples: 1, 3, 5, 7, 9 So far so good. Consider this potential...
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