Total number of cubic blocs are 50. To construct a solid cube with none left over, what will be the minimum numbers that needs to be taken?
- 23
- 22
- 21
- 20
- None of these
Explanation
A cube can be made with equal blocks for length breadth and height.
Let's see, 1*1*1=1 2*2*2=8 3*3*3=27 4*4*4=64.
Oops, larger than 59. So we need only 27 blocks.
That means that we can take away 50-27=23 blocks.
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