Question : Directions: Three of the following four are alike in a certain way and thus form a group. Which is the one that does NOT belong to that group?
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: 153 – 17
Option 2: 261 – 29
Option 3: 94 – 11
Option 4: 207 – 23
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Correct Answer: 94 – 11
Solution :
Let's check the options –
First option:
153 – 17; 153 ÷ 9 = 17
Second option:
261 – 29; 261 ÷ 9 = 29
Third option:
94 – 11; 94 ÷ 9 = 10.44 ≠ 11
Fourth option:
207 – 23; 207 ÷ 9 = 23
So, in the third option, the first number is not the multiple of 9. Hence, the third option is correct.
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