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648
ReplyDeleteC
ReplyDeletebecoz
ReplyDelete27(27-3)
27(24)
multiply last digits
4*7=ends wit 8
therefore 648
option is c
ReplyDeletec
ReplyDelete648 dude
ReplyDelete648
ReplyDeleteC:648
ReplyDelete648
ReplyDeletelawra
ReplyDeleteC
ReplyDeletec
ReplyDelete27(27-3)
ReplyDeleteEven multiplying 27*27 is a waste of time. Just look at the last digits by distributing it:
= _7 * _7 - _7 * 3
= _ _ 9 - _ 1
= _ _ 8
only number that fits the bill is 648.
648
ReplyDeleteC
ReplyDelete648
ReplyDelete