VTMO 2026 - Grade 5 - Semifinal - SET 1 - Self-study Question 14

Mr Tư has 538 oranges in five baskets. He adds 2, 4, 8, 16 and 32 oranges to baskets 1, 2, 3, 4 and 5 respectively. All five baskets then contain equal numbers. How many oranges were originally in basket 1?