Question

5. Determine composite number or not
(i) 3x4x5x6+3 (ii) 4x3x5x7x2+3x4x3+2 (iii) 4x7x3x9 + 4x5 +3x2 +1


Please tell me how to solve this question..​

Answer 1

All three are composite number because they have more than two factors

Answer 2

Answer:

Step-by-step explanation:

a composite number has more than 2 factors

i.e other than 1 and ITSELF.

i) 363, factors are 1, 363, 3, 9.......and so on

363 is divisible by 3 and because th sum of the digits is divisible by 3 and 9

hence, other than 1 and 363 this number 363 has more than 2 factors

therefore,it is a composite number

ii) 912, also divisible by 3

there fore more than 2 factors

hence it is a composite number

iii) 783, sum of the digits is 7+8+3=18 divisible by 3

therefore 783 is also divisible by 3

hence it has more than 2 factors

so it is a composite number