Question

If lcm of two prime numbers a and b (a>b) is 667 then the value of 7b-5a is:

Answer 1

Step-by-step explanation:

a & b are Here prime numbers

:- Lcm of (a&b) = a*b

:- 667 = 23×29

:- a*b = 23×29

as given , a>b

so , a= 29

b = 23

hence , 7b - 5a

:- 7×23 - 5×29

:- 161-145 = 16

7b-5a = 16 .