Suppose the cicadas come out every C years and a predator comes out every P years. Then the life cycles of the predator and the cicadas will coincide every LCM(C, P) years. The predator will want it to happen as often as possible while the cicadas want that to happen as seldom as possible. If C is co-prime with P then the cycles coincide after CP years - which is best for the cicada.
Suppose the cicadas come out every C years and a predator comes out every P years. Then the life cycles of the predator and the cicadas will coincide every LCM(C, P) years. The predator will want it to happen as often as possible while the cicadas want that to happen as seldom as possible. If C is co-prime with P then the cycles coincide after CP years - which is best for the cicada.
Suppose the cicadas come out every C years and a predator comes out every P years. Then the life cycles of the predator and the cicadas will coincide every LCM(C, P) years. The predator will want it to happen as often as possible while the cicadas want that to happen as seldom as possible. If C is co-prime with P then the cycles coincide after CP years - which is best for the cicada.
Suppose the cicadas come out every C years and a predator comes out every P years. Then the life cycles of the predator and the cicadas will coincide every LCM(C, P) years. The predator will want it to happen as often as possible while the cicadas want that to happen as seldom as possible. If C is co-prime with P then the cycles coincide after CP years - which is best for the cicada.
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Suppose the cicadas come out every C years and a predator comes out every P years. Then the life cycles of the predator and the cicadas will coincide every LCM(C, P) years. The predator will want it to happen as often as possible while the cicadas want that to happen as seldom as possible. If C is co-prime with P then the cycles coincide after CP years - which is best for the cicada.
three
There are 25 prime number years in the 20th century. Prime number years are those that have only two factors: 1 and the number itself. The 20th century spans from 1901 to 2000, and the prime number years within this range are: 1901, 1907, 1911, 1913, 1917, 1919, 1931, 1933, 1939, 1949, 1951, 1957, 1959, 1961, 1963, 1973, 1979, 1987, 1993, 1997.
The setting of A Woman in Her Prime by Asare Konadu is a remote village. The storey is about an African woman named Pokuwaa, who at 30 years old does not have children and is on her third husband.
Ordinal.
The number of years in 3 decades is 30. February does not have 30 days. It has 28 days and every fourth year one day is added, so it has 29 days, as this year.