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: 8 – 72
Option 2: 11 – 143
Option 3: 7 – 63
Option 4: 9 – 99
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Correct Answer: 8 – 72
Solution : Let's check the options – First option: 8 – 72; 8 2 = 64; 64 + 8 × 2 = 64 + 16 = 80 ≠ 72 Second option: 11 – 143; 11 2 = 121; 121 + 11 × 2 = 121 + 22 = 143 Third option: 7 – 63; 7 2 = 49; 49 + 7 × 2 = 49 + 14 = 63 Fourth option: 9 – 99; 9 2 = 81; 81 + 9 × 2 = 81 + 18 = 99
So, the first option does not follow the pattern of the other three options. Hence, the first option is correct.
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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
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