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Last updated on July 1st, 2025

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Prime Numbers 150 to 200

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The natural numbers greater than 1 are called prime numbers. Prime numbers have only two factors, 1 and the number itself. Besides math, we use prime numbers in many fields, such as securing digital data, radio frequency identification, etc. In this topic, we will learn about the prime numbers 150 to 200.

Prime Numbers 150 to 200 for Saudi Students
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Prime Numbers 150 to 200

A prime number is a natural number with no positive factors other than 1 and the number itself. And the prime number can only be evenly divisible by 1 and the number itself. Here are some basic properties of prime numbers:

 

 

  • Every number greater than 1 is divisible by at least one prime number.

 

  • Two prime numbers are always relatively prime to each other.

 

  • Every even positive integer greater than 2 can be written as the sum of two prime numbers.

 

  • Every composite number can be uniquely factored into prime factors.

 

  • Except for 2, all prime numbers are odd; 2 is the only even prime number.
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Prime Numbers 150 to 200 Chart

A prime number chart is a table showing the prime numbers in increasing order. The chart simply includes all the prime numbers up to a certain limit for identifying the prime numbers within a range.

 

For kids, it will be less difficult to understand the prime numbers through the chart. The significance of this prime number chart is used in different fields like the Foundation of mathematics, fundamental theorem of arithmetic.

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List of All Prime Numbers 150 to 200

The list of all prime numbers from 150 to 200 provides a comprehensive view of numbers in this range that can only be divided by 1 and the number itself. The prime numbers in the range of 150 to 200 include 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, and 199.

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Prime Numbers - Odd Numbers

Prime numbers and odd numbers are the numbers that are only divisible by 1 and the number itself. It cannot be evenly divisible by 2 or other numbers. 2 is the only even prime number, which divides all the non-prime numbers. Therefore, except 2 all prime numbers are considered as the set of odd numbers.

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How to Identify Prime Numbers 150 to 200

Prime numbers are a set of natural numbers that can only be divided by 1 and the number itself. Here are the two important ways to find whether a number is prime or not.

 

By Divisibility Method:

 

To find whether a number is prime or not, we use the divisibility method to check. If a number is divisible by 2, 3, or 5 then it will result in a non-prime number. Prime numbers are only divisible by 1 and itself, so if a number is divisible by the number itself and 1 it is meant to be a prime number.

 

For example: To check whether 167 is a prime number,

 

Step 1: 167 ÷ 2 = 83.5 (remainder ≠ 0)

 

Step 2: 167 ÷ 3 = 55.66 (remainder ≠ 0)

 

Step 3: 167 ÷ 5 = 33.4 (remainder ≠ 0)

 

Since no divisors are found, 167 is a prime number.

 

By Prime Factorization Method:

 

The Prime factorization method is the process of breaking down the composite number into the product of its prime factors. The method of prime factorization helps to identify the prime numbers up to 200 by building the smallest blocks of any given number.

 

For example: The prime factorization of 180: Let's break it down into the smallest prime numbers until it can’t divide anymore.

 

Step 1: 180 ÷ 2 = 90

 

Step 2: Now, we divide 90, 90 ÷ 2 = 45

 

Step 3: Now take 45, since 45 ends in 5 divide the number with 5 45 ÷ 5 = 9

 

Step 4: Take 9, since 9 is divisible by 3, 9 ÷ 3 = 3

 

Step 5: At last, take 3. 3 ÷ 3 = 1

 

Therefore, the prime factorization of 180 is: 180 = 2² × 3² × 5.

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Rules for Identifying Prime Numbers 150 to 200

Rule 1: Divisibility Check: Prime numbers are natural numbers that are greater than 1 and have no divisors other than 1 and the number itself. In the divisibility check rule, we check whether the prime number is divisible by 2, 3, 5, and 7. If it's divisible by these numbers then it's not a prime number.

 

Rule 2: Prime Factorization: In this prime factorization method, we break down all the numbers into their prime factors, showing them as the product of prime numbers.

 

Rule 3: Sieve of Eratosthenes Method: The method, sieve of Eratosthenes, is an ancient algorithm used to find all prime numbers up to a given limit. First, we list all the numbers from 150 to 200. Then start with the first prime number, 2. Mark all the multiples of 2 as non-prime.

 

Repeat the process for the next unmarked prime number and continue until you reach the square root of 200, approximately 14.14. The remaining unmarked numbers are the prime numbers.

 

Tips and Tricks for Prime Numbers 150 to 200

 

  • Use common shortcuts to memorize the prime numbers. 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199 use these numbers as reference.

 

  • Practice using the method of Sieve Eratosthenes efficiently. Numbers like 152, 154, 156, 158, 160 are never meant to be prime.

 

  • Knowing the common powers of numbers helps in avoiding unnecessary checks.
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Common Mistakes and How to Avoid Them in Prime Numbers 150 to 200

While working with the prime numbers 150 to 200 children might encounter some errors or difficulties. We have many solutions to resolve those problems. Here are some given below:

Mistake 1

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Confusing composite numbers with prime numbers.

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A prime number has exactly 2 divisors, 1 and the number itself. Remember that composite numbers have more than 2 divisors. For example, 153 is not a prime number because it has more than 2 divisors.

Mistake 2

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Including 1 as a prime number.

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Always remember that primes are greater than 1. 1 is not a prime number because it has only one divisor, itself.

Mistake 3

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Not efficiently using the prime checking method.

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Practice using the method of Sieve Eratosthenes efficiently, or check divisibility by primes up to the square root of the number. For example, while checking the divisibility of 169, stop once you reach √169.

Mistake 4

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Not realizing about the primes in the larger prime range.

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Keep on practicing identifying the larger primes, as it helps to sharpen the skills of children. The usage of the method of Sieve Eratosthenes helps to solve this.

Mistake 5

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Forgetting about multiples of any prime number is not prime.

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Erase all the multiples of known prime numbers as soon as possible. For example, if you're checking numbers up to 200, you don't have to check numbers divisible by 2, 3, or 5 because they are not prime.

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Prime Numbers Examples

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Problem 1

Is 197 a prime number?

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Yes, 197 is a prime number.

Explanation

The square root of 197 is √197 = 14.035, we check divisibility by primes less than 14.035. (2, 3, 5, 7, 11, 13).

 

197 ÷ 2 = 98.5

 

197 ÷ 3 = 65.666

 

197 ÷ 5 = 39.4

 

197 ÷ 7 = 28.142

 

197 ÷ 11 = 17.909

 

Since 197 is not divisible by any of these numbers, 197 is a prime number.

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Problem 2

A website requires a password that is the largest prime number between 150 and 200. Which prime number is that?

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199 is the largest prime number between 150 and 200.

Explanation

Prime numbers are natural numbers that are greater than 1 and have no divisors other than 1 and the number itself.

 

The prime numbers between 150 and 200 are 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199. 199 is the largest prime number in this range, therefore the password is 199.

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Problem 3

A teacher challenges her students: Find the prime numbers that are closest to 175 but less than 175.

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173 is the prime number which is closest to 175.

Explanation

173 is a prime number because it is only divisible by 1 and the number itself. And the next prime number after 173 is 179, which is greater than 175.

 

Therefore, the prime number closest to 175 and less than 175 is 173.

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FAQs on Prime Numbers 150 to 200

1.Give some examples of prime numbers.

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2.Explain prime numbers in math.

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3.Is 2 the smallest prime number?

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4.Which is the largest prime number?

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5.Which is the largest prime number between 150 to 200?

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6.How can children in Saudi Arabia use numbers in everyday life to understand Prime Numbers 150 to 200?

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7.What are some fun ways kids in Saudi Arabia can practice Prime Numbers 150 to 200 with numbers?

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8.What role do numbers and Prime Numbers 150 to 200 play in helping children in Saudi Arabia develop problem-solving skills?

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9.How can families in Saudi Arabia create number-rich environments to improve Prime Numbers 150 to 200 skills?

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Important Glossaries for Prime Numbers 150 to 200

  • Prime numbers: The natural numbers which are greater than 1 and that are divisible by 1 and the number itself. For example, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199.

 

  • Odd numbers: The numbers that are not divisible by 2 are called odd numbers. All prime numbers except 2 are odd. For example, 151, 153, 155, 157, 159.

 

  • Composite numbers: Composite numbers are non-prime numbers that have more than 2 factors. For example, 152 is a composite number, and it is divisible by 1, 2, 76, and 152.

 

  • Divisibility: A mathematical way to determine if one number can be divided by another without a remainder. For example, 180 is divisible by 2, 3, 5, and 6.

 

  • Sieve of Eratosthenes: An efficient ancient algorithm to find all prime numbers up to a specified integer.
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Hiralee Lalitkumar Makwana

About the Author

Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.

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Fun Fact

: She loves to read number jokes and games.

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