Question

Mr. Campbell's age is a multiple of 5 and 6 His age is one away from a multiple of 7 He is younger than 100 years old

Answer 1

5-5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95
6-6,12,18,24,30,36,42,48,54,60,66,72,78,84,90,96
Both have-30,60,90
Cant be 30 because the closest multiples of 7 are 28 and 35
Cant be 60 because the closest multiples are 56 and 63
It’s 90 becuase 7x13 = 91 91-1=90
Age= 90