Question
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.,43 - Operations on 43 such as adding /subtracting /multiplying etc. to 43 can be performed. Breaking down 43 into 4 and 3 and then performing mathematical operations on 4 and 3 is not allowed)Solution
Logic: First number x 5 = Second number & Second number × 25 = Third number.  (4 - 20 - 500) =  4 × 5 = 20 & 20 x 25 = 500 (Correct)  (3 - 15 - 375) = 3 × 5 = 15 & 15 × 25 = 375 (Correct)  (6 - 30 - 750) = 6 × 5 = 30 & 30 x 25 = 750 (Correct)  (9 - 45 - 975) = 9 × 5 = 45 & 45 × 25 = 1125 (not equal to 975) (Incorrect)  Hence, the correct answer is (D).
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