Select the set in which the numbers are related in the same way as are the numbers of the following sets.
(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)
(82, 35, 78)
(18, 27, 30)
1
(21, 27, 24)
2
(15, 36, 38)
3
(27, 33, 40)
4
(20, 25, 32)