Question : Directions: Three of the following number triads are alike in some manner and one is different. Select the odd number triad.
(NOTE: The second and third numbers in the given number triads are formed by performing a certain operation on the first number. The same operation is followed in all the number triads except one. Find that odd number triad.)
Option 1: 3 : 21 : 147
Option 2: 8 : 56 : 3100
Option 3: 1 : 7 : 49
Option 4: 10 : 70 : 490
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Correct Answer: 8 : 56 : 3100
Solution :
Let's check the options –
First option:
3 : 21 : 147→3 × 7 = 21; 3 × 49 = 147
Second option:
8 : 56 : 3100→8 × 7 = 56; 8 × 49 = 392 ≠ 3100
Third option:
1 : 7 : 49→1 × 7 = 7; 1 × 49 = 49
Fourth option:
10 : 70 : 490→10 × 7 = 70; 10 × 49 = 490
So, the second option does not follow the pattern of the other three options. Hence, the second option is correct.
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