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BEBRAS 2025 Grade 3-4 Round 2 Ext Question 6

BEBRAS · BEBRAS 2025 Grade 3-4 Round 2 Ext

Question 6

Genaro has a balance and five weights of 1,3,9,27,81 grams. The example shows how to weigh 11 grams of herbs.

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The herbs stay on the right pan. In a code, R means put that weight on the right, L means left, O means unused. Code positions follow the weights 1,3,9,27,81 in that order. For example, 11 grams is RLLOO.

Question illustration

Which code weighs 34 grams of herbs?
  1. LORLO
  2. RRRRL
  3. LRLLO
  4. OLRLO