Answer:
1. 99
2. 47 and 53 there sum is 100
3. 97 and 95
4. 23 and 29
5. 4,6,8 9,10,12 14,15,16
Step-by-step explanation:
1. the largest prime number lower than less than 100 is 97. So, The sum of the two numbers is 97+2=99.
2. The prime numbers immediately before and after 50 are 47 and 53. Their sum is 100.
3. In the No.3 they have same question in No.1 but their question is difference between the largest prime and composite numbers below 100. so that 97-2=95 so the 97 is largest prime number 2 is smallest numbers so the difference is 95 so let's to multiply 5 by 19=95 that sum of 5 and 19=24 so for the answer is 24.
4. 23 and 29 are the prime numbers between 20 and 30.
No even number is a prime number (except 2). Hence, 20, 22, 24, 26, 28 and 30 are not prime.
5. The first few composite numbers (sometimes called "composites" for short) are 4, 6, 8, 9, 10, 12, 14, 15, 16, ... (OEIS A002808), whose prime decompositions are summarized in the following table. Note that the number 1 is a special case which is considered to be neither composite nor prime.
