how many factors does 1155 have that are divisible by 3
Answers
Answered by
14
Answer:
3 is itself I think this only
Answered by
8
The number of factors 1155 has that are divisible by 3 are: 7
□Method 1:
▪The factors of 1155 are (1,3,5,7,11,15 21,33,35,55,77 105,165,231,385,1155).
▪Of these 3,15,21 ,33,105,165,231 are divisible by 3.
▪Hence the number of factors is 7
□Method 2:
▪The prime factorizations of 1155 is expressed as 5×3×7×11.
▪The number of ways of grouping 3 to get its factors is 3! + 1 =7.
Similar questions