A rectangle is split into a left half and a right half. The left half has one line across it; the right half is cut into a 3 by 2 grid. How many rectangles are there in all?

Question

Accepted Answer

23. Left half: top, bottom and the half itself, 3. Right half: 32 × 42 = 18 . Spanning both halves (only the top and bottom edges run all the way): from the left edge to either upright line of the right half, 2. Total 3 + 18 + 2 = 23 .

A rectangle is split into a left half and a right half. The left half has one line across it; the right half is cut into a 3 by 2 grid. How many rectangles are there in all?

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