OpenStudy (anonymous):

Which number is divisible by 3? a.1,438 b.275 c.3,842 d.7,221

6 years ago
OpenStudy (anonymous):

add all the numbers together if the total is dividable by 3 u can devide the whole number by 3 ! for example 1438=1+4+3+8=16 and since 16 is not dividable by 3 then 1438 is not either

6 years ago
OpenStudy (anonymous):

so the answer is D because the total is 12 ! remember this rule only works for 3

6 years ago
OpenStudy (anonymous):

yup

6 years ago
OpenStudy (anonymous):

cool...i never knew that :)

6 years ago
OpenStudy (anonymous):

its actually helpful a lot :D

6 years ago
OpenStudy (anonymous):

thanks

6 years ago