Question

Find the wrong number in the series

7, 28, 63, 124, 215, 342, 511
A) 28
B) 124
C) 215
D) 342

Answer 1

48

Q:

Find the wrong number in the series

7, 28, 63, 124, 215, 342, 511

A) 28B) 124C) 215D) 342

Answer:   A) 28 

Explanation:

Here the number follows the given rule 

 23-1, 33-1, 43-1, 53-1, ...

 

But 28 has been given in problem series.

 

so 28 is wrong number.

Answer 2

Hey mate ^_^

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Answer:
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$2^3 = 8 - 1 = 7$

$3^3 = 27 + 1 = 28$

$4^3 = 64 - 1 = 63$

$5^3 = 124 - 1 = 124$

$6^3 = 216 - 1 = 215$

$7^3 = 343 - 1 = 342$

$8^3 = 512 - 1 = 511$

As per the logic, 28 is the wrong number.

The correct series should be:

$7, 26, 63, 124, 215, 342, 511$

Therefore,

Correct option A) 28

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