Except '189', all the others are square number.
25 ? 52, 64 ? 82, 225 ? 152 and 121 ? 112
Except '39', all the others are prime numbers, while 39 is a composite number
As, 39 ? 13 x 3
83 is the only number which is prime, while others are composite numbers.
Except 'Sweet', all the others are baked items.
Except '78', if you subtract 1, all the others give a prime number.
All other are adjectives denoting size.
Except '225' , all the other are perfect squares of natural numbers.
Except '384' , all the others are perfect Cube of natural number.
Except '98' ,all other are multiples of 6.
84 ? 6 x 14, 120 ? 6 x 20,72 ? 6 x 12,108 ? 6 x 18
143 ? 122 - 1,257 ? 162 + 1, 195 ? 142 - 1, 15 ? 42 - 1,
Hence, '257' is odd one.
Except 'Bat' all the others are birds but bat is a mammal.
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