1. Which of the following three digit number will be second largest among them after 2 is subtracted from the middle digit of each number and the positions of the first and the third digits are interchanged ?
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By: anil on 05 May 2019 01.31 am
If first and third digits are interchanged and 2 is subtracted from middle digit. Then, the numbers become : 572 -> 255 [ 5 $$leftrightarrow$$ 2 & 7-2 = 5] 853 -> 338 [ 8 $$leftrightarrow$$ 3 & 5-2 = 3]
974 -> 459 [ 9 $$leftrightarrow$$ 4 & 7-2 = 5]
368 -> 843 [ 3 $$leftrightarrow$$ 8 & 6-2 = 4]
489 -> 964 [ 4 $$leftrightarrow$$ 9 & 8-2 = 6]
$$ herefore$$ The second largest no. is 843 $$Leftrightarrow$$ 368
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974 -> 459 [ 9 $$leftrightarrow$$ 4 & 7-2 = 5]
368 -> 843 [ 3 $$leftrightarrow$$ 8 & 6-2 = 4]
489 -> 964 [ 4 $$leftrightarrow$$ 9 & 8-2 = 6]
$$ herefore$$ The second largest no. is 843 $$Leftrightarrow$$ 368