Having 5 at units place, find the square of the number 185.
48034
15620
34225
83450
A
34225
B
83450
C
48034
D
15620
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Solution
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185=(200−15)
1852=(200−15)2
(200−15)2=2002+152−2×200×15
1852=40000+225−6000
1852=34225
Hence, Option A is correct.
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