Question

1. A shopkeeper has 5 red pens, x green pens and
8 black pens. If range of the data is a multiple of 7
and x is a two-digit prime number, then the sum of
digits of maximum possible value of x is
please give step by step explaination ​

Answer 1

Answer:

+ 8 + 89 = 102 is a multiple of 7, Hence, the maximum value of x is 89, That is, the sum of digits of maximum possible value of x is 17.