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: (7 – 343 – 331)
Option 2: (6 – 216 – 206)
Option 3: (5 – 125 – 115)
Option 4: (4 – 64 – 54)
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Correct Answer: (7 – 343 – 331)
Solution : Let's check each option –
First option:
(7 – 343 – 331)→7³ = 343; 343 – 10 = 333 (333
≠
331)
Second option:
(6 – 216 – 206)→6³ = 216; 216 – 10 = 206
Third option:
(5 – 125 – 115)→5³ = 125; 125 – 10 = 115
Fourth option:
(4 – 64 – 54)→4³ = 64; 64 – 10 = 54
Hence, the first option is correct.
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