The total age of A and B is 12 years more than the total age of B and C. By how many years C is younger to A?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 12
B’s age appears in both totals, so when the two totals are compared it cancels out, and the gap between the totals is the gap between A and C. The actual ages are not needed.
The question says: \(A+B=(B+C)+12\)
Taking B away from both sides leaves \(A=C+12\)
So A is older than C by \(A-C=12\) years
So C is 12 years younger than A.