Question 21
A frog on a lotus leaf wants to catch the dragonfly. It may jump only between two touching neighbouring leaves, and only east or south. How many different paths lead from the frog to the dragonfly?
Compass: north is up, east is right, south is down and west is left.
Scoring note: the source Preliminary Star is optional: +10 if correct, −10 if wrong, 0 if blank or unselected. This practice import does not apply negative marks automatically; deduct 10 manually for a wrong answer to this question when reproducing the source score.
Compass: north is up, east is right, south is down and west is left.
Scoring note: the source Preliminary Star is optional: +10 if correct, −10 if wrong, 0 if blank or unselected. This practice import does not apply negative marks automatically; deduct 10 manually for a wrong answer to this question when reproducing the source score.