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BEBRAS 2019 Grade 3-4 Round 2 Ext Question 3

BEBRAS · BEBRAS 2019 Grade 3-4 Round 2 Ext

Question 3

Juno is approaching Jupiter. Its autopilot can move in eight directions. In the original Vietnamese compass, B=N, Đ=E, N=S and T=W; ĐB=NE, TB=NW, ĐN=SE and TN=SW. For example, 1 B means one step north and 2 ĐB means two steps northeast.

Question illustration

Which command sequence gets Juno to Jupiter fastest without hitting an asteroid? The original direction abbreviations are retained in the choices.
  1. 3 TB, 1 B
  2. 1 ĐB, 3 TB
  3. 2 B, 3 T, 2 B
  4. 1 T, 3 TB, 1 ĐB