Question

Draw an array for 31× 3

Answer 1

draw 31 dots on one side and add 10 dots on the other

Explanation:

like this

................................

................................

................................

(this might be 32 so count before answering)

Answer 2

...............................

...............................

...............................

^ this is all 31. and you have three groups. so now you have the array you want.