Problem 3. Masha has 4 pieces of red plasticine, 3 pieces of blue plasticine, and 5 pieces of yellow plasticine. First, she divided each non-red piece of plasticine in half, and then she divided each non-yellow piece of plasticine in half. How many pieces of plasticine did Masha get
Answer: 30 pieces of plasticine.

Solution. After Masha's first action, the number of blue and yellow pieces of plasticine doubles. They become 6 and 10, respectively. After Masha's second action, the number of red and blue pieces of plasticine doubles. They become 8 and 12, respectively. Then the total number of pieces of plasticine is $8+12+10=30$.