Which number replaces 'X' in the below figure?

7 370  3
6 224  2
X 730  1

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Bihar CET B.Ed 2022 Official Paper
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  1. 2
  2. 9
  3. 11
  4. 12

Answer (Detailed Solution Below)

Option 2 : 9
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Detailed Solution

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Given,

The logic followed here is, the second number is the addition of cubes of the first number and last number,
73 + 33 = 343 + 27 = 370.
63 + 2= 216 + 8 = 224.
X3 + 13 = 730 
X3 = 730 - 1 = 729
Hence, X = 9.

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