XAT 2018 Question Paper | Quantitative Aptitude and Data Interpretation

CAT Questions

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Question 15 : X and Y are the digits at the unit's place of the numbers (408X) and (789Y) where X ≠ Y. However, the digits at the unit's place of the numbers (408X)⁶³ and (789Y)⁸⁵ are the same. What will be the possible value(s) of (X + Y)?
Example: If M = 3 then the digit at unit's place of the number (2M) is 3 (as the number is 23) and the digit at unit's place of the number (2M)2 is 9 (as 232 is 529).

1. 9
2. 10
3. 11
4. 12
5. None of these

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Video Explanation

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Explanatory Answer

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Choice B is the correct answer.

 

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