Question

write the greatest prime number greater than 30​

Answer 1

Answer:

hope 29.......

pls Mark me brainleast

Answer 2

Step-by-step explanation:

Let’s start by writing out the numbers between 20 and 30:

21,22,23,24,25,26,27,28,29

Eliminate all the even numbers; they can’t be prime

21,23,25,27,29

Now do the same of for all multiples of 3:

23,25,29

And finally, multiples of 5:

23,29

And we are left with the two primes between 20 and 30: 23, 29.

This process is a variation of the Sieve of Eratosthenes, perhaps the oldest method in existence for finding prime numbers. Notice that, though we could have checked for multiples of 7, it would be redundant; this is because the largest prime less than the 30−−√ is 5, which was necessary to eliminate the 25=52 . The smallest number which requires a 7-sieve would be 49=72 .