If Blake had 344 blocks, could he build a cube with all the blocks?
2 answers:
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If a number's ten digit is and the units digit is
, then you can write the number as
.
Obviously, inverting the digits would lead to the number .
Since this new number is 36 less than the original, we have
Since we also know that the digit in the tens place is three times that in the units place, we can add an equation to form a system:
And thus