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Simplify:(103515)2...

Simplify:(103515)2

A.

75.00

B.

15.00

C.

8.66

D.

3.87

Correct answer is B

Note that 1035=1035×55

= 10155=215

hence, (103515)2 = (21515)2

= (21515)(21515)

= 415×15215×15215x15+15×15

= 4 x 15 - 2 x 15 - 2 x 15 + 15

= 60 - 30 - 30 + 15

= 15