Q:

Select the odd group of numbers. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g.13 – Operations on 13 such as adding /subtracting /multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)

• 1
  (7 – 343 – 331)
• 2
  (6 – 216 – 206)
• 3
  (5 – 125 – 115)
• 4
  (4 – 64 – 54)