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: (400 – 40 – 4)
Option 2: (300 – 30 – 7)
Option 3: (1000 – 100 – 10)
Option 4: (500 – 50 – 5)
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Correct Answer: (300 – 30 – 7)
Solution :
Let's check each option –
First option:
(400 – 40 – 4)→400 ÷ 10 = 40; 40 ÷ 10 = 4
Second option:
(300 – 30 – 7)→300 ÷ 10 = 30; 30 ÷ 10 = 3 ≠ 7
Third option:
(1000 – 100 – 10)→1000 ÷ 10 = 100; 100 ÷ 10 = 10
Fourth option:
(500 – 50 – 5)→500 ÷ 10 = 50; 50 ÷ 10 = 5
So, the second option is different from other options. Hence, the second option is correct.
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