7/27/2019 Prime Numbers Worksheet

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1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

31 32 33 34 35 36 37 38 39 40

41 42 43 44 45 46 47 48 49 50

51 52 53 54 55 56 57 58 59 60

61 62 63 64 65 66 67 68 69 70

71 72 73 74 75 76 77 78 79 80

81 82 83 84 85 86 87 88 89 90

91 92 93 94 95 96 97 98 99 100

Goal: The student will be able to identify different properties of the numbers (multiply,divisors and primer factors) and recognize prime numbers up to 20 and find all prime

numbers less than 100.

PRIME NUMBERS

Definition: A prime number (or a prime) is a natural number

that has exactly two distinct natural number divisors: 1 and

itself.

The smallest twenty-five prime numbers (all the primenumbers under 100) are:

NOTE: The shadow boxes are the primes.

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m

Remember Always to

start dividing by the

smallest prime number

factor of the number.

Left:

Prime

Numbe

rs

Right:

Other

Factors

When you get a prime

number on the right

YOU FINISHED.

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Goal: The student will be able to identify different properties of the

numbers (multiply, divisors and primer factors) and recognize primenumbers up to 20 and find all prime numbers less than 100.

EXERCISE 1:

Write into the next box the first twenty-five prime numbers.

EXERCISE 2:

During the summer months, one

ice cream truck visits Jeannette's

neighborhood every 4 days andanother ice cream truck visits her neighborhood every 5 days. If

both trucks visited today, when is the next time both trucks will visit on the same day.

EXERCISE 3:

List all the numbers less than or equal to 50 that aredivisible by 5.

Name: Group: 5- Term:

II

Date:

Teacher: MARTHA LILIANA ARDILA IBARRA

IMPORTANTTOREMEMBER

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________________________________________________

________

EXERCISE 4:

Is the stamen, All numbers that are divisible by 3 are alsodivisible by 9 True or false? Explain.

EXERCISE 5:

Goal: The student will be able to identify different properties of the

Name: Group: 5- Term: II

Date:

Teacher: MARTHA LILIANA ARDILA IBARRA

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XMC 346 XMC 159

XMC 313 XMC 333

numbers (multiply, divisors and primer factors) and recognize prime

numbers up to 20

and find all prime

numbers less than

100.EXERCISE 1:

The traffic administration need to know if the two last number in the nextlicense plates are prime or arent prime.

___________ ___________

___________ ___________

EXERCISE 2:Circle only the no prime number.

5 8 9 2 1 11 13 14

25 32 33 99 97 3 44 55

EXERCISE 3:

Is the statement true or false? Explain.

A All even numbers are divisible by 4.

________________________________________________________

B All numbers divisible by 6 are divisible by 3.

________________________________________________________C All odd numbers are divisible by 3.

EXERCISE 4:

List the first six multiples of each number.A 23: ___________________________________________________

B 7:_____________________________________________________

C 9:_____________________________________________________

EXERCISE 5:

Explain the different between a prime number and composite number.Use examples in your explanation.