OG(11TH)PROBLEM 88

[吳]

88.A necklace is made by stringing N individual beads together in the repeating pattern red bead, green bead, white bead, blue bead, and yellow bead.If the necklace design begins with a red bead and ends with a white bead, then N could be equal
(a)16
(b)32
(c)41
(d)54
(e)68
answer(e)

有人會這題嗎?麻煩解答一下,謝謝~

[grady]

88.A necklace is made by stringing N individual beads together in the repeating pattern red bead, green bead, white bead, blue bead, and yellow bead.If the necklace design begins with a red bead and ends with a white bead, then N could be equal

red, green, white, blue, yellow => 5
red ..... white => 5n + 3, n >= 0
只有(E)符合

[吳]

i c thank you
原來pattern可以不由x始y結束
123451234512345123 我可以說他是由1-5的pattern是這個意思嗎???