Instructions
In the following number series, only one number is ‘‘wrong’’. Find out the ‘’wrong’’ number.
Solution
Let us find the difference between consecutive terms of the series.
The terms are 128, 640, 981, 1199, 1324 and 1388
And the difference between consecutive terms is 512, 341, 218, 125, 64
We notice that if 981 is replaced by 983, the difference in the terms will be perfect cubes i.e 512, 343, 216, 125 and 64.
Hence, the number which is wrong in the series is 983
Need AI Help?
Create a FREE account and get:
- Banking Quant Shortcuts PDF
- Free Banking Study Material - (15000 Questions)
- 135+ Banking previous papers with solutions PDF
- 100+ Online Tests for Free
