Question

( 517 times 324 )
add the digits
( 5+1+7+*+3+2+4 )
If it have to divisible by 3 if has fo divide the whole digit sum ( *+22 div 24 )
22
( therefore cdot * ) is ( 2^{prime} )

# 10 110. If 517324 is divisible by 3, then what smallest digit is there in place of? (b) 1 (c)2 (d) None of these

Solution