On interchanging + and - and 4 and 8 in (b),
we get the equation as
8 + 4 - 12 = 0
or 12 - 12 = 0
or 0 = 0, which is true.
In all the numbers except 383, the middle digit is the product of the other two digits.
All are multiple of 3 except 83.
Similarly, 32:112:(2/7)
32 ? 3 x 2 = 6
'Uneasy' and 'Quiet' are opposite to each other. Likewise, 'Fit' and 'Unfit' are opposite to each other
Belief is a different word from others.
It is not necessary that A is a clerk though he is poor.
All are insects.
Except 'Sodium' all other are radioactive.
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