Q: 113 (CAPF/2009)

The grandfathers age is 4 years more than nine times the age of the grandson. The fathers age of 40 years is 2 years less than six times the age of his son. The age of the grandfather is :
question_subject: 
Maths
question_year: 
2009
question_exam: 
CAPF
stats: 
0,144,104,40,40,144,24