Quantitative Aptitude
Exercise Mode
Pick Wrong No.
Practice and master this topic with our carefully crafted questions.
5
Questions
8
Minutes
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Completed
Directions to Solve
Find out the wrong number in the given sequence of numbers.
Question 11
1, 8, 27, 64, 124, 216, 343
Correct Answer: Option D
The numbers are 13, 23, 33, 43 etc. So, 124 is wrong;
it must have been 53 i.e., 125.
Question 12
5, 16, 6, 16, 7, 16, 9
Correct Answer: Option A
Terms at odd places are 5, 6, 7, 8 etc. and each term at even place is 16.
So, 9 is wrong.
Question 13
6, 13, 18, 25, 30, 37, 40
Correct Answer: Option D
The differences between two successive terms from the beginning are 7, 5, 7, 5, 7, 5.
So, 40 is wrong.
Question 14
56, 72, 90, 110, 132, 150
Correct Answer: Option D
The numbers are 7 x 8, 8 x 9, 9 x 10, 10 x 11, 11 x 12, 12 x 13.
So, 150 is wrong.
Question 15
36, 54, 18, 27, 9, 18.5, 4.5
Correct Answer: Option B
The terms are alternatively multiplied by 1.5 and divided by 3. However, 18.5 does not satisfy it.