Study the given pattern carefully and select the number that can replace the question mark (?) in it.

First row: 124, 38, 100
Second row: 78, 25, 64
Third row: 94, 31, ?

(NOTE: Operations should be performed on the whole numbers, without breaking down the number into its constituent digits. For example, 13 - Operations on 13 such as adding/deleting/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.)