How many squares of all sizes can be counted in a 3 × 3 grid of unit squares?

14. Count by size: nine 1×1 squares, four 2×2 squares and one 3×3 square. In all, 9 + 4 + 1 = 14.

How many squares of all sizes can be counted in a $3 \times 3$ grid of unit squares?

Competition practiceReasoning & Mental Ability

Count by size: nine

1 \times 1

squares, four

2 \times 2

squares and one

3 \times 3

square. In all, 9 + 4 + 1 = 14.

Answer: C) 14

Don't just memorise the answer — build a daily practice habit.