Prime numbers worksheet grade 7 pdf

Prime and composite numbers worksheets promote an understanding of how to solve questions involving prime and composite numbers. There are multiple questions available in these worksheets based on LCM, HCF, factorization and so on.

Benefits of Prime and Composite Numbers Worksheets

Prime and composite numbers worksheets are used in data analysis, computer science mathematics, etc., to solve a variety of real life questions. Thus students must be well versed in the topic. By practicing the problems in the prime and composite numbers, worksheets students can master the topic in no time.

The worksheets are interactive, and the visual simulations prove to be very helpful in clearing concepts for young minds. In addition to this, the worksheets are very well structured, ensuring that students do not get confused while solving the problems.

Read More :- Topic-wise Math Worksheets

Download Prime and Composite Numbers Worksheet PDFs

The worksheets can also be used for competitive exams such as Olympiads. They are easy to use and free to download.

What are prime and composite numbers in maths? Grade 7 maths questions are presented along with detailed solutions. Detailed Solutions and explanations are included.

What are prime and composite numbers in maths?
A prime number is a whole number greater than 1 that can only be evenly divided by 1 and itself.
Examples: 2, 3, 5, 7, 11,... are prime numbers. If you try to divide them by numbers other than 1 or themselves, the remainder will not be zero.
A composite number is a whole number greater than 1 that can be evenly divided by 1, itself and other numbers.
Examples: 4, 6, 8,12..are composite numbers because:
4�2 = 2 , 4 is divisible by 1, itself and 2
6�2 = 3 , 6�3 = 2 , 6 is divisible by 1, itself, 2 and 3.
8�2 = 4 , 8�4 = 2 , 8 is divisible by 1, itself, 2 and 4.
12�2 = 6 , 12�3 = 4 , 12�4 = 3 , 12�6 = 2 , 12 is divisible by 1, itself, 2, 3, 4 and 6.

Answer the following Questions on Prime and Composite Numbers.

1. Which of the following numbers are prime?
   1, 6.3, 11, 14, 13, 21, 23, 4/5, 100, 123 .
   
2. Which of the following numbers are composite?
   1, 8.4, 15, 13, 9/2, 24, 33.
   
3. List all prime numbers between 30 and 50 inclusive.
   
4. List all composite numbers between 100 and 110 inclusive.
   
5. Is the sum of two prime numbers always a prime number?
   
6. Is the product of two prime numbers also a prime number?
   
7. Which is the largest 3 digit prime number?
   
8. Which is the smallest 2 digit prime number?
   
9. List all the two digit prime numbers that can be made from the digits 1, 3 and 6 (used only once each).
   
10. Can you find a prime number whose least significant digit (digit on the right) is 0?
    
11. Can you find a prime number whose least significant digit (digit on the right) is 5?
    
12. Can you find a prime number such that the sum of all its digits is equal to 12?
    
Detailed Solutions and explanations are included.

Explore our wide range of free pdf worksheets to help your child identify prime numbers and composite numbers up to 99 with precision. These practice worksheets help them understand that prime numbers have only two factors, the number 1 and itself; while composite numbers have more than two factors. Kids efficiently identify the given numbers as composite or prime numbers by listing the factors, completing the tables, and answering MCQs. Answer keys are included.

We strongly recommend these printables for grade 4 and grade 5 students.

CCSS: 4.OA

Prime and composite numbers worksheets have a variety pdf exercises to understand recognize prime and composite numbers. Also amusing display charts which list the prime and composite numbers from 1 to 100 and extremely engaging activities like coloring, cutting, pasting and mazes are here for your children in grade 4 through grade 7. Free sample worksheets are included.

Display Charts

The first two printable charts given below show the prime and composite numbers from 1-100. The third one has both prime and composite numbers listed till 100. Ideal for 4th grade and 5th grade children.

Coloring Chart

Pick up your favorite color. Color all the prime numbers in chart 1 and all the composite numbers in chart 2. In chart 3, color all the prime and composite numbers green and yellow.

Coloring Activity: In the Sky

An enjoyable Christmas theme is given here in these worksheets. Color all the prime stars yellow and the composite stars green. These pdf worksheets are tailor-made for children of grade 4 and grade 5.

Write Prime or Composite: Themed

Colorful snails, tortoises and crabs carry a prime or a composite number on it. Write whether the number on each of them is prime or composite.

Write Prime or Composite: Standard

Each printable worksheet has 18 standard questions for practice of 6th grade and 7th grade students. For the given numbers, recognize if they are prime or composite.

Cut-Paste Activity

Carefully cut out the fishes and glue them on the prime and composite fish pots. Try out this activity and rejuvenate the little kittens who are expecting the fishes.

Identifying Prime or Composite

Each pdf worksheet has 10 questions. List out the factors of the given number and also write if the numbers are prime or composite.

Prime Maze

Boost your mind! Try these interesting mazes on three distinctive themes. Find the path from top to bottom by coloring all the prime numbers with exactly two factors.

Composite Maze

Figure out the composite numbers: the numbers that have more than two factors; color them all and help the animated characters find their way out of the maze.

Prime or Composite: MCQ

These printable prime and composite number worksheets have MCQs to find the odd prime, even prime, odd composite and even composite numbers. Recommended for grade 5 through grade 7 students.