In general, the farther away from the Sun, the greater the distance from one planets orbit to the next.
NASA has sent an unmanned probe to survey a distant solar system with four planets. Planet Zorb is farthest from the sun of this solar system, Planet Krakatoa is second farthest, Planet Beanbag is third, and Krypton is the closest. The probe visits the planets in order, first Zorb, then Krakatoa, then Beanbag and finally Krypton. Did the probe have to fly farther in its trip from
  Zorb to Krakatoa or
  from Beanbag to Krypton?