Advanced Mathematics Primary 5 Volume

Stan has built a small solid using 11 one-centimetre cubes. He wants to add more 1-cm cubes to it to form a complete cube of edge 4 cm. How many MORE 1-cm cubes does he need?

A 64
B 5
C 53
D 27
Show Worked Solution

Worked Solution

Step 1: Volume of a cube of edge 4 cm = 4 × 4 × 4 = 64 cm³, so it needs 64 unit cubes in total. Step 2: Stan already has 11 unit cubes. Step 3: Number of MORE cubes needed = 64 − 11 = 53. Answer: 53

Correct answer: 53

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