Advanced Mathematics Primary 5 Volume

Siti has 100 unit cubes. She uses them to build a solid cuboid that is 6 cubes long, 5 cubes wide and 3 cubes tall. How many unit cubes will she have left over?

A 10
B 28
C 25
D 90
Show Worked Solution

Worked Solution

Step 1: Find the number of unit cubes needed to build the cuboid. 6 × 5 × 3 = 90 unit cubes Step 2: Find the number of unit cubes left over. 100 − 90 = 10 unit cubes Siti will have 10 unit cubes left over.

Correct answer: 10

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