Question 3 - Figure it out - Page 114, 115 - Chapter 5 Class 6 - Prime Time (Ganita Prakash)

Transcript

Question 3 Are there an equal number of primes occurring in every row in the table on the previous page? Which decades have the least number of primes? Which have the most number of primes?Let’s look at all prime numbers till 100 Here, each decade means numbers 1-10, 11-20, or 90-99 i.e each row No, there are not an equal number of primes in each decade Decade with the least number of primes is 91-100, which has only one prime number (97). Decade with the most number of primes are 1-10 (2, 3, 5, 7) – four prime numbers 11-20 (11, 13, 17, 19) – four prime numbers Therefore, Smallest difference is 1, which occurs between 2 and 3. Largest difference is 8, which occurs between 89 and 97.