COS-C EXAM STUDY GUIDE 2026
COMPLETE QUESTIONS AND ANSWERS
◉Prime Number. Answer: A whole number greater than 1 that only
has two factors (itself and 1)
◉Composite Number. Answer: A whole number greater than 1 that
has more than two different factors
◉Rational Numbers. Answer: All integers, decimals and fractions;
any terminating or repeating decimal number
◉Irrational Numbers. Answer: Cannot be written as fractions or
decimals because the number of decimal places is infinite and there
is no recurring pattern of digits within the number (e.g. pi)
◉Real Numbers. Answer: Set of all rational and irrational numbers
◉Order of Operations. Answer: PEMDAS
M/D and A/S are worked left to right in order
, ◉Commutative Property. Answer: The order of two numbers may be
switched around and the answer is the same
*THINK COMMUTE = move
◉Associative Property. Answer: Grouping numbers together does
not change the value *THINK ASSOCIATE = group
◉Distributive Property. Answer: a(b + c) = ab + ac
◉Additive Identity Property. Answer: a + 0 = a
◉Additive Inverse Property. Answer: Any (+) number added to its
opposite (-) is equal to zero
◉Multiplicative Identity Property. Answer: 1 is the multiplicative
identity such that a x 1=a
◉Multiplicative Inverse Property. Answer: "Reciprocal"
◉Law of Exponents. Answer: 1) Any number raised to the power of
1 is equal to itself
2) The number 1 raised to any power is equal to 1
3) Any number raised to the power of 0 is equal to 1
COMPLETE QUESTIONS AND ANSWERS
◉Prime Number. Answer: A whole number greater than 1 that only
has two factors (itself and 1)
◉Composite Number. Answer: A whole number greater than 1 that
has more than two different factors
◉Rational Numbers. Answer: All integers, decimals and fractions;
any terminating or repeating decimal number
◉Irrational Numbers. Answer: Cannot be written as fractions or
decimals because the number of decimal places is infinite and there
is no recurring pattern of digits within the number (e.g. pi)
◉Real Numbers. Answer: Set of all rational and irrational numbers
◉Order of Operations. Answer: PEMDAS
M/D and A/S are worked left to right in order
, ◉Commutative Property. Answer: The order of two numbers may be
switched around and the answer is the same
*THINK COMMUTE = move
◉Associative Property. Answer: Grouping numbers together does
not change the value *THINK ASSOCIATE = group
◉Distributive Property. Answer: a(b + c) = ab + ac
◉Additive Identity Property. Answer: a + 0 = a
◉Additive Inverse Property. Answer: Any (+) number added to its
opposite (-) is equal to zero
◉Multiplicative Identity Property. Answer: 1 is the multiplicative
identity such that a x 1=a
◉Multiplicative Inverse Property. Answer: "Reciprocal"
◉Law of Exponents. Answer: 1) Any number raised to the power of
1 is equal to itself
2) The number 1 raised to any power is equal to 1
3) Any number raised to the power of 0 is equal to 1
