Question : Directions: The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs, EXCEPT one. Find that odd number pair.
Option 1: (21, 238)
Option 2: (17, 194)
Option 3: (13, 150)
Option 4: (23, 270)
Correct Answer: (23, 270)
Solution :
Let's check the options –
First option:
(21, 238); 21 × 11 = 231; 231 + 7 = 238
Second option:
(17, 194); 17 × 11 = 187; 187 + 7 = 194
Third option:
(13, 150); 13 × 11 = 143; 143 + 7 = 150
Fourth option:
(23, 270); 23 × 11 = 253; 253 + 7 = 260 ≠ 270
So, only the fourth option does not follow the same pattern. Hence, the fourth option is correct.
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