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  1. 9998 x 999 = ?
    1. 9997001
    2. 9988002
    3. 9987012
    4. 9898012
Correct Option: B

Exp.= 9998 x 999
= 9998 x (1000-1)
= 9998 x 1000 - 9998 x 1
= 9998000 - 9998 = 9988002


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