Cognizant Odd Man Out Quiz– 1

The 537 is an odd number as per the series given.

10 - has fewer than 3 factors (=2*5)
30 - has a factor of 3 (=2*3*5)
68 - has a factor of 17, or, has factors that differ by more than 3 (=2*2*17)
128 - has no odd factors, or, only has one prime factor (raised to a power), or, is not a 2-digit number (=2^7)

Options 3 is the answer
B*2=4--->D
F*2=12--->L
K*2=22--->v
but j*2=20 so JT is right

1243 -> ABDC

BUT KLMN IS IN SEQUENCE

C is the correct option.

First and last alphabet are in order.
Second and third in reverse order.

ADG Having 3 diffrences between two words such as ADG=A+3=D+3=G :ADG BEH having 3 differences between two words such as BEH=B+3=E+3=H :BEH SUT Having No difference so odd one is the SUT

In all other groups, first and third letters are moved 2 steps forward to obtain fourth and second letters respectively.

PCAQ 

 

WYSD is the ans.
reab gives word bear
soed =does
aetf=feat

wyzd does not make any word.

Each of the numbers except 168, is a perfect square