Question

Encircle the odd one of the following
(a) (–1) × (–1)
(b) (–1) × (–1) × (–1)
(c) (–1) × (–1) × (–1) × (–1)
(d) (–1) × (–1) × (–1) × (–1) × (–1) × (–1)

Answer 1

b is the answer .....................
in a ,c,d we get 1
but in b we get -1

Answer 2

the correct answer is (b)

option (b) is odd one out as......
rest all options make 1
but this option makes -(-1)