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)

Q:

Option 

• 1
  (6 – 60 – 50)
• 2
  (7 – 70 – 68)
• 3
  (8 – 80 – 70)
• 4
  (9 – 90 –80)