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When multiplied by itself, which numberis equal to 12,345,678,987,654,321?A: 1,111,111B: 111,111,111<C: 11,111,111,111D: 111,111,111,111 |
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Answer» option b. is correct please find my answer option B is correct Answer Answer is 111,111,111. Now the reason: we know 11x11=121 (middle digit of 11^2 is 2 and number of 1’s in 11 is 2),111x111=12321 (middle digit of 111^2 is 3 and number of 1’s in 111 is 3)1111x1111=1234321 (middle digit of 1111^2 is 3 and number of 1’s in 111 is 4)Similarly, 111,111,111x111,111,111=12,345,678,987,654,321 (middle digit of 111,111,111^2 is 9 and number of 1’s in 111,111,111 is 9) B is a correct answer.plz like my answer. 111,111,111 is the correct answer option (B) i.e 111,111,111 is the correct answer |
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