If `3+5+6+9+10+12+15+18+20+...+100=N`, the find the number of distinct prime factors of N

If A = {9, 10, 11, 12, 13} and let f : A rarr N is defined by f(x) = highest prime factor of x. then the number of distinct elements in the image of f is : "(a) 6 (b)7 (c) 8 (d) 4 "

If A = {9, 10, 11, 12, 13} and let f : A rarr N is defined by f(x) = highest prime factor of x. then the number of distinct elements in the image of f is :

Let A = {9, 10 , 11 , 12 , 13} and let f : A ->N be defined by f(n) = the highest prime factor of n. Find the range of f.

Let A = {9, 10 , 11 , 12 , 13} and let f : A ->N be defined by f(n) = the highest prime factor of n. Find the range of f.

Let A = {9, 10 , 11 , 12 , 13} and let f : A ->N be defined by f(n) = the highest prime factor of n. Find the range of f.

Let A={9, 10, 11, 12, 13, 14, 15, 16, 17} and let f:A to N be defined by f(n)= the highest prime factor of ninA . Write f as a set of ordered pairs and find the range of f.

Let A = {9,10,11,12,13} and let f : A rarr N be defined by f(n)= the highest prime factor of n. Find the range of f.

Let A={9,10,11,12,13} and let f: A to N be defined by f(n)= the highest prime factor of n. Find the range of f.

Let A={9,10,11,12,13} and let f: A to N be defined by f(n)= the highest prime factor of n. Find the range of f.

Let A={9,10,11,12,13} and let f: A to N be defined by f(n)= the highest prime factor of n. Find the range of f.