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Computing Topic 5 > Topic 5 - Number systems > Flashcards

Topic 5 - Number systems Flashcards

1
Q

What notation is used for natural numbers?

A

N

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2
Q

Give some examples of natural numbers

A

1,2,3,4,5

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3
Q

What is the definition of natural numbers?

A

Positive integers

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4
Q

Is 8 a natural number?

A

Yes

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5
Q

Is -8 a natural number?

A

No

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6
Q

Is 0.5 a natural number

A

No

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7
Q

What notation is used for integer numbers?

A

Z

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8
Q

Give some examples of integer numbers

A

-2,-1,0,1,2

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9
Q

What is the definition of integer numbers?

A

Integer numbers are numbers that a whole but can be either positive or negative

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10
Q

Is 8 an integer number?

A

Yes

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11
Q

Is -8 an integer number?

A

Yes

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12
Q

Is 8.78 an integer number?

A

No

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13
Q

What is the notation for rational numbers?

A

Q

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14
Q

Give some examples of rational numbers

A

7/2,8/1,100/3

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15
Q

What is the definition of rational numbers?

A

Numbers that can be written as simple fractions or ratios of integers.

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16
Q

Is √4 a rational number?

A

Yes √4 = 2 or 2/1

17
Q

Is -2 a rational number?

A

Yes

18
Q

Are prime numbers rational numbers?

A

Yes as they are still divisible by 1

7/1

19
Q

What is the notation for irrational numbers?

A

There isn’t one

20
Q

Give some examples of irrational numbers

A

pi, √2, √3, √99

21
Q

What is the definition of irrational numbers?

A

An irrational number cannot be written as a ratio of two numbers. Note that not all square roots are irrational.

22
Q

What is the notation for real numbers?

A

R

23
Q

Give some examples of real numbers

A

1, 12.41, √2, 0, 12/7

24
Q

What is the definition of real numbers?

A

They include: whole numbers, integers, rational, irrational numbers; they can be positive, negative or 0.

25
Q

What are ordinal numbers?

A

Numbers used to denote the position of an object in relation to a list

26
Q

Give some examples of ordinal numbers

A

1st, 2nd, 3rd, 4th

Computing Topic 5 (14 decks)

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