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Why don't 17 year old cicadas and 13 year old cicadas appear together?
Wiki User
∙ 15y ago
This question is equivalent to asking what multiples of 13 and 17 are equal, and more specifically, what is the lowest multiple of 13 that equals a multiple of 17 or what is the lowest multiple of 17 that equals a multiple of 13. Since 13 and 17 are prime, they have no factors in common. This means that the lowest common multiple is equal to 13 x 17 = 221. Therefore, it will be 221 years before the 13 and 17 year cicadas appear together again.
Wiki User
∙ 12y ago
Wiki User
∙ 15y agoThey do appear together. Cicadas appear every year in late summer.
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How many years after an appearance of 13 year and 17 year cicadas together will both types of cicadas appear together again?
342years
If Cicadas have predators with 2 year hibernation cycles how often would 12 year cicadas face their predators?
how often would a 12 year cicada face its predator with a 2 year cycle?
How did the cicadas decide that they would wait a prime number of year before emerging?
To think of cicadas as "deciding" something is anthropomorphizing; that is, using words that describe human attributions with things that don't really think as humans do. What probably happened is that those cicadas which happened to have a prime number cycle tended to avoid having predators match their periodic appearances and so increased relative to those that didn't, and as a consequence, got eaten. This is Natural Selection. Incidently, only Periodic cicadas have prime number cycles (17 or 13 years); there are also Annual cicadas which as their name implies, appear every year.
What do 17 year locusts eat?
17 year "locusts" are cicadas rather than actual locusts. They feed on tree sap.
Are cicadas found in Ontario?
Yes. I usually find several in my backyard each year in Thamesford, Ontario.
What is the name of the bug that comes out once every 17 years?
Cicadas have a 17-year or 13-year life-cycle, depending on the variety.
Suppose there were 12 year 14 year and 16 year cicadas and thy all came up this year how many years will elapse before they all come up together again?
240? How about 336? The lowest common factor is 2. 2X6 = 12 2x7 = 14 2x8 = 16 so.... 6x7x8 = 336
If cicadas come every 17 years and caterpillars every 6 years what year will they coincide?
every 102 years
What year did the key first appear?
What year did the key first appear?
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*Dont say I love you! *Go to the park together *Hold hands in public
What year did blink182 split up?
wwell i dont know what year but they broke up then angels and airwaves formed and recently they broke up and blink 182 is back together
If you will fail in tybcom so you will appear in mcom this year?
If you will fail in tyb.com so you will appear in M.com this year?
