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((489+375)^2-\ (489-375)^2=?)/((489xx375...

`((489+375)^2-\ (489-375)^2=?)/((489xx375))` 144 (b) 864 (c) 2 (d) 4 (e) None of these

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RS AGGARWAL-NUMBER SYSTEM-All Questions
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  2. If (64)^2-(36)^2=20xxx\ t h e n\ x=? 70 (b) 120 (c) 180 (d) 140...

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  3. ((489+375)^2-\ (489-375)^2=?)/((489xx375)) 144 (b) 864 (c) 2 (d...

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  4. ((963+476)^2+\ (963-476)^2)/((963xx963+\ 476xx476))=? 2 (b) 4 (c) ...

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  5. (768×768×768+232×232×232)/(786×768−768×232+232×232) =? (a) 1000       ...

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  6. (854×854×854−276×276×276)/(854×854+854×276+276×276)=? (a) 1130        ...

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  7. (753×753+247×247−753×247)/(753×753×753+247×247×247)=? (a) 1/1000 (b) 1...

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