If the LCM of two co-prime numbers is 340 and difference between them is 3, then find the number of prime numbers that are smaller than the larger number among the given numbers.

6 7 8 9

8

LCM = 340 HCF = 1            xy = 340 Two numbers are = 20 and 17 The number of prime numbers = 2, 3, 4, 5, 7, 11, 13, 17, 19 = 8 numbers