🍡🍡🍡Prime and Square Numbers🍡🍡🍡

Welcome 👦👧boys and girls. Today, we'll be exploring and learning about prime and square numbers. Read all given definitions and examples of prime and square numbers. Please complete all given tasks below.

What are factors?

Factors are numbers that divide evenly into a given number (with no remainder).

Example:

1. What are the factors of 6? 

      6 [ 1, 2, 3 6] these numbers can divide evenly into 6 without any remainder

What are prime numbers?

Definition: A prime number is a whole number greater than 1 that has exactly two factors: 1 and the number itself. Two 2 is the only even prime number.
Examples:

What are Square Numbers? 

Definition: A square number is a number you get by multiplying a whole number by itself.

👦👧boys and girls now let us now watch video clips on prime and square numbers.

Click and watch the video                       Click and watch the video     

👦👧boys and girls activities time!!!

Task 1:

Choose the correct answer.

1. Which number is prime?
   A) 1      B) 4       C) 7       D) 9

2. Which number has exactly two factors (1 and itself)?
   A) 12      B) 13      C) 15      D) 16

3. Which number is not prime?
   A) 17      B) 19      C) 21      D) 23

4. Which number is a square number?
   A) 18       B) 20      C) 25     D) 27

5. ${\mathrm{What\; is\; 3}}^2=?$        A) 6      B) 9      C) 12       D) 15

6. Which number is a square number?

7. A) 36     B) 38        C) 40      D) 42

8. Which number is prime and also a square number?
   A) 1       B) 4       C) 9        D) 2

9. Which list contains only prime numbers?
   A) {2, 4, 6}        B) {3, 5, 7}          C) {8, 9, 10}        D) {11, 12, 13} 

Task 2:

Write True or False.

1. 2 is a prime number. ______
2. 1 is a prime number. ______
3. 9 is a square number. _____
4. 12 is a prime number. ______
5. 16 is a square number. _______
6. 25 is a square number. _______
7. 17 is a prime number. ______
8. Every prime number is a square number. _____

Task 3:

Directions: Read each scenario. Tell whether the number is prime or square (or both), and explain.

1.  Sam says, “The number $13$ is prime because it only has factors 1 and 13.”

   • Is Sam correct? Explain.

2. Taylor says, “$49$ is a prime number.”

   • Is Taylor correct? Decide if $49$ is prime, square, or both. Explain.

3. A student is checking $4$. They say, “$4$ is a square number because $2 \times 2 = 4$.”

   • Is this true? Also tell whether $4$ is prime or not.

4.  Ms. Lee gives the class the number $9$.

   • Students must identify if $9$ is prime, square, or both, and justify using factors or multiplication.