Multiple choice

Find the wrong term in the following number series- 2015 2023 2007 2071 1815

  1. 1815

  2. 2007

  3. 2015

  4. 2023

  5. 2071

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The series pattern is: subtract 8, add 16, subtract 32, add 64, subtract 128 (powers of 2: 2^3, 2^4, 2^5, 2^6, 2^7 with alternating signs). 2023-8=2015, 2015+16=2031, 2031-32=1999, 1999+64=2063, 2063-128=1935. The given 2015 doesn't fit.