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)

(300 - 30 - 7)

(400 - 40 - 4) = 400 ÷ 10 = 40 and 40 ÷ 10 = 4

(300 - 30 - 7) = 300 ÷ 10 = 30 and 30 ÷ 10 = 3 but 7 is given which is odd from others

(1000 - 100 - 10) = 1000 ÷ 10 = 100 and 100 ÷ 10 = 10

(500 - 50 - 5) = 500 ÷ 10 = 50 and 50 ÷ 10 = 5