Sam has 12 black-and-white photos and 18 color photos. He wasn't to put the photos in equal rows so each row has either black-and-white photos only or color photos only. In how many rows can Sam arrange the photos

5,6,or 3

Step-by-step explanation:

all of these are comon multiples of the 3

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.