Question

Find the possible missing twins for the following numbers so that they become twin primes:

(i) 29
(ii) 89
(iii) 101

Answer 1

(i) The possible missing twins for 29 are 27 and 31. Since 31 is a prime and 27 is not, 31 is the missing twin.

(ii) The possible missing twins for for 89 are 87 and 91. Since 87 and 91 are not primes, 89 has no twin.

(iii) The possible missing twins for 101 are 99 and 103. Since 103 is a prime and 99 is not, 103 is the missing twin.