Question 1164985
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<pre>

    {{{T^2}}} - {{{3T}}} = 40

    T*(T-3) = 40


So, the number 40 is the product of two integer factors that differ by 3.


Quick guessing gives you the answer T = 8 :  Tad is 8 years old.


<U>CHECK</U>.  8^2 - 3*8 = 64 - 24 = 40.   ! Correct !
</pre>

Solved.


For an 8-year boy, Tad demonstrates pretty good calculation skills (!)