Michael J. answered 02/02/17
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Effective High School STEM Tutor & CUNY Math Peer Leader
If we divide the 18 strips into even groups of 3
1st person gets 3 strips
2nd person get 3 strips
3rd person get 3 strips
4th person gets 3 strips
5th person get 3 strips
3 x 5 = 15
If we divide the 18 strips into even groups of 4,
1st = 4 strips
2nd = 4 strips
3rd = 4 strips
4th = 4 strips
5th = 4 strips
4 x 5 = 20
Since 20 is greater than 18, each person gets 3 strips with only 3 remaining.