Multiple choice

In the following number series, a wrong number is given. Find out that wrong number. 20480 5120 1280 320 100 20 5

  1. 5120

  2. 320

  3. 1280

  4. 100

  5. 5

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

The pattern is ÷4 repeatedly: 20480÷4=5120, 5120÷4=1280, 1280÷4=320, 320÷4=80, 80÷4=20, 20÷4=5. The given 100 breaks this pattern—it should be 80. All other terms fit the ÷4 pattern.