Four number-pairs are given out of which three are alike in a certain way and one is different. Select the number-pair that is different from the rest.
From the above option (A) $$ 18 \times 17 = 306 $$
(B) $$ 23 \times 24 = 552 $$
(C) $$13 \times 14 = 182 $$
(D) $$25 \times 26 = 650 $$
then from above line A is different from other it is multiply by one less than it self .
therefore (A ) 18 : 306 AnsÂ
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