DSSSB · Reasoning

In the following number-pairs, the second number is obtained by performing certain mathematical operations on the first number. What numbers should come in place of (Note: Operations should be performed on whole numbers without breaking the numbers into their component digits. Take 13 for example, operations on 13 Like adding/subtracting/multiplying 13, etc. can be done. It is not allowed to break 13 into 1 and 3 and then perform mathematical operations on 1 and 3.)

  1. X=46, Y=87
  2. X=46, Y=79
  3. X=49, Y=81
  4. X=49, Y=79
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