Number Types, Sets, Notation, Rounding and Vocab

Question 1

What is a Real Number?

Answer 1

All numbers

Question 2

What is a Rational Number?

Answer 2

Numbers that can be made by dividing two integers (i.e can be written as p/q)

Question 3

What is an Irrational Number?

Answer 3

A real number that cannot be made by dividing two integers (i.e cannot be written as p/q)

Question 4

What is an Integer?

Answer 4

A whole number (positive or negative) that can be written without a fractional component

Question 5

What is a Whole Number?

Answer 5

A positive number starting from zero

Question 6

What is a Natural Number?

Answer 6

Counting numbers (whole numbers without zero)

Question 7

What does the number notation “N” refer to?

Answer 7

Natural Numbers

Question 8

What does the number notation “W” refer to?

Answer 8

Whole Numbers

Question 9

What does the number notation “I” or “Z” refer to?

Answer 9

Integers

Question 10

What does the number notation “Q” refer to?

Answer 10

Rational Numbers

Question 11

What does the number notation “Q bar” refer to?

Answer 11

Irrational Numbers

Question 12

What does the number notation “R” refer to?

Answer 12

Real Numbers

Question 13

What is a Multiple?

Answer 13

The result of multiplying a number by an integer

Question 14

What is a Lowest Common Factor?

Answer 14

The smallest whole number which is a multiple of two numbers

Question 15

What is a Factor?

Answer 15

Numbers we can multiply together to get another number

Question 16

What is a Highest Common Factor?

Answer 16

The highest number that can be divided exactly into each of two or more numbers

Question 17

What is an Exponent?

Answer 17

Exponent of a number says how many times to use that number in a multiplication

Question 18

What is a Power?

Answer 18

Exponent of a number says how many times to use that number in a multiplication

Question 19

What is an Index?

Answer 19

Exponent of a number says how many times to use that number in a multiplication

Question 20

What is an Absolute Value?

Answer 20

How far away a number is from zero

Question 21

What is a Composite Number?

Answer 21

A whole number that can be made by multiplying other whole numbers

Question 22

What is Expanded Form?

Answer 22

The expanded form of a number writes it as a sum, with each digit makes an individual term.

Question 23

What is a Quotient?

Answer 23

The answer after we divide one number by another, dividend / divisor = quotient

Question 24

What is a Product?

Answer 24

The answer when two or more values are multiplied together

Question 25

What is a Sum?

Answer 25

The answer when two or more values are added together

Question 26

What is a Prime Number?

Answer 26

A whole number greater than 1 that can not be made by multiplying other whole numbers (the reverse of composite numbers)

Question 27

What is a Reciprocal?

Answer 27

The reciprocal of a number is of a number is 1 divided by the number (i.e. reverse the fraction)

Question 28

Round 247.58 to 1 significant figure

Answer 28

200

Question 29

Round 372.99 to 2 significant figures

Answer 29

370

Question 30

Round 0.0219 to 2 significant figures

Answer 30

0.022

Question 31

Round 5239 to 3 significant figures

Answer 31

5240

Question 32

Write 12,534 in Standard Form

Answer 32

1.2534 × 10⁴

Question 33

Write 0.24 in Standard Form

Answer 33

2.4 × 10^(−1)

Question 34

What is an order of magnitude?

Answer 34

The power of ten required when writing a number in standard form