Question 137

Which number is wrong in the given series?
12439, 23549, 34659, 45769

Solution

here we need to find the wrong number in 12439, 23549, 34659, 45769

as we will add the digits of every number

12439 : 1+2+3+4+9 = 19

23549 : 2+3+5+4+9 = 23

34659 : 3+4+6+5+9 = 27

45769 : 4+5+7+6+9 = 31

As we can see that in very case the sum of digits of number is a prime number except in case of 34659 and hence 34659 is the odd one out

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Which number is wrong in the given series?12439, 23549, 34659, 45769