{"id":1957,"date":"2022-12-15T12:11:14","date_gmt":"2022-12-15T20:11:14","guid":{"rendered":"http:\/\/sd41blogs.ca\/smithc\/?p=1957"},"modified":"2023-08-22T11:21:28","modified_gmt":"2023-08-22T18:21:28","slug":"determining-prime-and-composite-numbers","status":"publish","type":"post","link":"https:\/\/sd41blogs.ca\/smithc\/determining-prime-and-composite-numbers\/","title":{"rendered":"Determining Prime and Composite Numbers, LCM, and GCF."},"content":{"rendered":"

PRIME & COMPOSITE NUMBERS<\/strong><\/p>\n

\"\"<\/p>\n

In class, we learned how to determine if a number is prime or composite. Prime Numbers have only 2 factors whereas composite numbers have many. \u00a0All even numbers are composite except the number 2. \u00a0The number 2 is the only even number that is prime because it only has two factors 1 and itself (2). \u00a0The number 1 is neither prime or composite where it\u2019s only factor is 1.<\/p>\n

To determine if an odd number is prime or composite we learned to apply the divisibility rule for 3. \u00a0If the sum of the digits is divisible by 3 then the number is composite. \u00a0If the sum is not divisible by 3 the number is prime.<\/p>\n

Example: \u00a027 (composite) \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a018001 (prime)<\/p>\n

2 + 7 = 9 – is divisible by 3 \u00a0 \u00a0 \u00a0 \u00a0 1 + 8 + 0 + 0 + 1 = 10 – is not divisible by 3<\/p>\n

LOWEST COMMON MULTIPLE (LCM) & GREATEST COMMON FACTOR (GCF)<\/strong><\/p>\n

In class we\u2019ve also been learning how to identify the Lowest Common Multiple (LCM) and Greatest Common Factor (GCF) of two numbers.<\/p>\n

Example:<\/strong><\/p>\n

4 and 36<\/strong><\/p>\n

4: 4, 8, 12, 16, 20, 24, 28, 32, 36<\/strong><\/p>\n

36: 36<\/strong>, 72, 98<\/p>\n

LCM = 36<\/strong><\/p>\n

Factors of 4: 1, 2, 4<\/strong><\/p>\n

Factors of 36: 1, 2, 4<\/strong>, 6, 9, 18, 36<\/p>\n

GCF= 4<\/strong><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

PRIME & COMPOSITE NUMBERS In class, we learned how to determine if a number is prime or composite. Prime Numbers have only 2 factors whereas composite numbers have many. \u00a0All even numbers are composite except the number 2. \u00a0The number 2 is the only evenRead More »<\/a><\/p>\n","protected":false},"author":8441,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[12,46,6],"tags":[],"_links":{"self":[{"href":"https:\/\/sd41blogs.ca\/smithc\/wp-json\/wp\/v2\/posts\/1957"}],"collection":[{"href":"https:\/\/sd41blogs.ca\/smithc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sd41blogs.ca\/smithc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sd41blogs.ca\/smithc\/wp-json\/wp\/v2\/users\/8441"}],"replies":[{"embeddable":true,"href":"https:\/\/sd41blogs.ca\/smithc\/wp-json\/wp\/v2\/comments?post=1957"}],"version-history":[{"count":5,"href":"https:\/\/sd41blogs.ca\/smithc\/wp-json\/wp\/v2\/posts\/1957\/revisions"}],"predecessor-version":[{"id":2576,"href":"https:\/\/sd41blogs.ca\/smithc\/wp-json\/wp\/v2\/posts\/1957\/revisions\/2576"}],"wp:attachment":[{"href":"https:\/\/sd41blogs.ca\/smithc\/wp-json\/wp\/v2\/media?parent=1957"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sd41blogs.ca\/smithc\/wp-json\/wp\/v2\/categories?post=1957"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sd41blogs.ca\/smithc\/wp-json\/wp\/v2\/tags?post=1957"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}