Question
If $a^2$ ends in $9,$ then $a^3$ ends in $7.$
✓
Answer
False.
Solution:
$\because (7)^2 = 49$ ends in $9$ and $(7)^3$,
i.e. $343$ does not end in $7.$
Solution:
$\because (7)^2 = 49$ ends in $9$ and $(7)^3$,
i.e. $343$ does not end in $7.$
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