Maths · Arithmetic and Geometric progressions

What number corresponds to the fifth missing planet?

What number corresponds to the fifth missing planet?

  • A. 28
  • B. 78
  • C. 32
  • D. 36

Step-by-step solution

The question refers to the Titius-Bode law, which predicts planetary distances. The sequence is 0, 3, 6, 12, 24, 48, ...; adding 4 gives 4, 7, 10, 16, 28, 52, ... The fifth term (n=5) is 28, corresponding to the missing planet (asteroid belt) at 2.8 AU.
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