Question 22

Three of the following four number-pairs are alike in a certain way and one is different. Identify the different one.

Solution

23:161 means $$7\times\ 23=161.$$

29:203 means $$7\times\ 29=203.$$

27:189 means $$7\times\ 27=189.$$

but 15:115 is not in same pattern.

So, option A is correct.

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