Composite Numbers

Out of the first 10 positive integers, how many of them are composite?


The answer is 5.

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7 solutions

Barjuan Davis
Nov 12, 2013

First 10 positive integers are 1,2,3,4,5,6,7,8,9, and 10.

remember, composite numbers are numbers that NOT A PRIME NUMBER.

So, you can take out 1,2,3,5, and 7. The rest are the answer.

Can you write what you mean? You are currently saying that 1 is a prime.

Calvin Lin Staff - 7 years, 7 months ago

I don't understand, why don't we put 10 as the answer too?

Edward Jeremy Lo - 7 years, 7 months ago

But 1 is not a prime number

lawal Adeshina - 7 years, 7 months ago

BUT IS 1 ALSO A PRIME NUMBER ?

Devesh Rai - 7 years, 6 months ago

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1 is prime!!!!!!!!!!! From where do you hear it????

shithil Islam - 5 years, 4 months ago
Mohammad Fiyaz
Feb 13, 2014

all the positive integers are composite numbers except all prime numbers and 1.

so first 10 positive integers are following:

1, 2, 3, 4, 5, 6, 7, 8, 9, 10

only 4, 6, 8, 9 and 10 are composite rest are prime numbers and 1 is unit.

thus, 5 is answer.

Nita Wijaya
Dec 9, 2013

The first 10 composite number are 4,6,8,9,10 [5] Composite number is a number that can be factorized 4 = 2^2 6 = 2 3 8 = 2^3 9 = 3^2 10 = 2 5

Composite Number is a whole number that can be divided evenly by numbers other than 1 or itself. Example: 9 can be divided evenly by 3 (as well as 1 and 9), so 9 is a composite number. 7 can only be divided evenly by 1 or 7, so it is NOT. 4, 6, 8, 9, 10 are COMPOSITE.

Shubham Namdeo
Nov 16, 2013

1,2,3,4,5,6,7,8,9,10 compite number is amumber which has factors other than 1 or the number itself. hence, the numbers are 4,6,8,9,10

John Patrick Bas
Nov 13, 2013

the first 10 positive integers are 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10. Only 4, 6 8, 9, and 10 are composite. then the answer is 5.

Ahmed Alaa
Nov 11, 2013

4 , 6 , 8 , 9 , 10

1 is neither a prime nor a composite.

SAMARTH M.O. - 7 years, 6 months ago

1-4-6-8-9-10

lawal Adeshina - 7 years, 7 months ago

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