Question

How many of the first 1992 prime numbers have reciprocals less tahn 0.05?

Answer 1

To have a reciprocal less than 0.05, the prime has to be more than 20. There are 8 primes less than 20, so there are 1992 - 8 = 1984 primes in the first 1992 primes that have reciprocals less than 0.05.