The following is a 4 8 array of dots.

Question

(a) If 10 dots are removed, how can you arrange the remaining dots so that each row and

each column of the array contain an odd number of dots? Sketch the new arrangement

or explain why it cannot be done.

(b) If 12 dots are removed, how can you arrange the remaining dots so that there is the

same number of dots along each edge? Sketch the new arrangement or explain why it

cannot be done.

Answer 1

Here are two possible solutions