If r is the remainder when the positive integer n is divided by 7, what is the value of r?
(1) when n is divided by 21, the remainder is an odd number.
(2) when n is divided by 28, the remainder is 3.

Step-by-step explanation:

Given that When n is divided by 21, the remainder is an odd number.

i.e. where m is an integer and k a positive integer <21

When n is divided by 28, the remainder is 3

, where c is a positive integer

This can be written as

Since n is giving odd remainder when divided by 21,

we get r =3 as n is a multiple of 7 +3

nada

step-by-step explanation:

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation: