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Question

Use the short cut method to find (110)2.


A

13100

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B

12200

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C

12100

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D

12300

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Solution

The correct option is C

12100


To find square of 110, we need to follow the given steps:
Step1: First subtract 100 from 110, we get 10.

Step2: Now add 10 to 110, we get 120.

Step3: Now we will square 10, we get 100, we will only take last two digit i.e., 00 of 100 and the 1 will get added to 120.

Hence, we get 120 + 1 = 121 and 00 from 100 will get added here to the right of 121.
So, square of 110 = 12100


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