In the following number series, a wrong number is given. Find out that number. 8, 18, 40, 86, 178, 370, 752. |
18 178 370 40 |
178 |
The following pattern is observed in the given series: Number x 2+ 2, Resulting number x 2 + (2+2), Resulting number x 2 + (2 + 4)...so on. 8×2+2 =18 18×2+4=40 40×2+6=86 86×2+8=180 It should have been 180, but the series shows 178. 180×2+10=370 370×2+12=752 So, 178 is the wrong number. |