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A shopkeeper labels gift cubes with their volumes. He realises that the units digit of the volume reveals the units digit of the edge for some edges.
Which edge length below gives a cube whose units digit is the SAME as the edge's units digit?

Class 8Patterns in CubesCubes and Roots
  • A5
  • B2
  • C3
  • D8

Step-by-Step Solution

Cubes preserving units digit: 0,1,4,5,6,9. Among the options, 5 works ends in 5). 2->8, 3->7, 8->2 do not.
Answer: A) 5

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