Question : Directions: Select the odd group of numbers.
(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their 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.)
Option 1: (17 – 51 – 147)
Option 2: (10 – 30 – 90)
Option 3: (15 – 45 – 135)
Option 4: (22 – 66 – 198)
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Correct Answer: (17 – 51 – 147)
Solution :
Let's check each option –
First option:
(17 – 51 – 147); 17 × 3 = 51; 51 × 3 = 153 ≠ 147
Second option:
(10 – 30 – 90); 10 × 3 = 30; 30 × 3 = 90
Third option:
(15 – 45 – 135); 15 × 3 = 45; 45 × 3 = 135
Fourth option:
(22 – 66 – 198); 22 × 3 = 66; 66 × 3 = 198
So, only the first option doesn't follow the same pattern as followed by the given set of numbers. Hence, the first option is correct.
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