Multiple choice

81:243, 16:64, 64:192, 25:75

  1. 81:243

  2. 16:64

  3. 64:192

  4. 25:75

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

The pairs follow a multiplication rule: 81*3=243, 64*3=192, 25*3=75. The pair 16:64 follows 16*4=64, making it the odd one out.