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If you have a box of volume xyz and you double everything, the new box is 2x•2y•2x = 8•xyz in volume.

So you can pack 8 x 16 = 128 cubes into the big box.

(And it should be DIFFERENT sizes, not ‘difference’ sizes. What kind of English are we teaching these days?! I won’t even mention the dubious syntax.)

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Lol.  It’s set by a math teacher after all.  Mistakes happen.  That’s why it is essential for test papers to undergo a test run by at least 2 teachers to remove mistakes.

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