write 4 pairs of co-prime numbers from 80 to 100
Answers
Answer:
not have any co-prime numbers
Step-by-step explanation:
There are many more coprime pairs than just 5 between 80 and 100.
Coprime numbers are numbers that have no common primes. Consecutive numbers are always coprime.
80 & 81, 81 & 82, 82 & 83, 83 & 84, 84 & 85, 85 & 86, 86 & 87, 87 & 88, 88 & 89, 89 & 90, 90 & 91, 91 & 92, 92 & 93, 93 & 94, 94 & 95, 95 & 96, 96 & 97, 97 & 98, 98 & 99, 99 & 100.
80 = 2⁴•5 : 81 = 3⁴ : 82 = 2•41 : 83 is prime : 84 = 2²•3•7 : 85 = 5•17 : 86 = 2•43
87 =3•29 : 88 = 2³•11 : 89 is prime : 90 = 2•3²•5 : 91 = 7•13 : 92 = 2²•23 : 93 = 3•31
94 = 2•47 : 95 = 5•19 : 96 = 2⁵•3 : 97 is prime : 98 = 2•7² : 99 = 3²•11 : 100 = 2²•5²
80 & 83, 80 & 85, 80 & 87, 80 & 89, 80 & 91, 80 & 93, 80 & 97, 80 & 99
81 & 83, 81 & 84, 81 & 85, 81 & 86, 81 & 88, 81 & 91, 81 & 92, 81 & 94, 81 & 95, 81 & 97 81 & 98, 81 & 100
82 & 85, 82 & 87, 82 & 89, 82 & 91, 82 & 93, 82 & 95, 82 & 97, 82 & 99
83 & 85, 83 & 86, 83 & 87, 83 & 88, 83 & 89, 83 & 90, 83 & 91, 83 & 92, 83 & 93, 83& 94, 83 & 95, 83 & 96, 83 & 97, 83 & 98, 83 & 99, 83 & 100
84 & 89, 84 & 95, 84 & 97
85 & 87, 85 & 88, 85 & 89, 85 & 91, 85 & 92, 85 & 93, 85 & 94, 85 & 96, 85 & 97, 85 & 98, 85 & 99
86 & 89, 86 & 91, 86 & 93, 86 & 95, 86 & 97, 86 & 99
87 & 89, 87 & 91, 87 & 92, 87 & 94, 87 & 95, 87 & 97, 87 & 98, 87 & 100
88 & 91, 88 & 93, 88 & 95, 88 & 97
89 & 91, 89 & 92, 89 & 93, 89 & 94, 89 & 95, 89 & 96, 89 & 97, 89 & 98, 89 & 99, 89 & 100
90 & 97
91 & 93, 91 & 94, 91 & 95, 91 & 96, 91 & 97, 91 & 99, 91 & 100
92 & 95, 92 & 97, 92 & 99
93 & 95, 93 & 97, 93 & 98, 93 & 100
94 & 97, 94 & 99
95 & 97, 95 & 98, 95 & 99
97 & 99, 97 & 100