Question:
Replace A, B, C by suitable numerals.
Solution:
$A=6$
$\therefore \quad A+7=6+7=13$
1 is carried over.
$(1+5+8)=14$
1 is carried over.
$\therefore B=4$
and $C=1$
$\therefore A=6, B=4$ and $C=1$
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