Question 396298
Since the difference is 10, the units digits have to be the same.
Only 4*4 and 6*6 give a units digit in the product of 6.
4*24 is not it, and 14 is not a factor.
That leaves 6 & 16.
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You can work it out with algebra, but it takes longer.
If it's a question on a test, and showing work is not required, do it the fastest way possible.