The grandfather’s age is 4 years more than nine times the age of the grandson. The father’s age of 40 years is 2 years less than six times the age of his son. The age of the grandfather is :
77 years
70 years
67 years
63 years
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC CAPF – 2009
From the second statement: The father’s age is 40 years.
F = 40
The father’s age (40) is 2 years less than six times the age of his son (GS).
F = 6 * GS – 2
40 = 6 * GS – 2
40 + 2 = 6 * GS
42 = 6 * GS
GS = 42 / 6 = 7 years. The grandson’s age is 7 years.
From the first statement: The grandfather’s age (G) is 4 years more than nine times the age of the grandson (GS).
G = 9 * GS + 4
G = 9 * 7 + 4
G = 63 + 4
G = 67 years.
The age of the grandfather is 67 years.