The Kaufman Assessment Battery for Children contains P subtests across the various ages, but a maximum of Q subtests is administered to any one child, where (P, Q) equals

The Kaufman Assessment Battery for Children has sixteen subtests, with at most thirteen given to any one child.

The full battery of sixteen spans the whole age range it covers.

Any single child takes only those subtests suited to their age, up to thirteen.

The pairs (10,5), (12,8) and (20,15) do not match its actual structure.

Each of those wrong pairs misstates either the total or the maximum administered.

The K-ABC assesses children roughly aged two and a half to twelve and a half.