A squirrel had stashed 210 acorns to last him the three winter months. It divided the pile into thirds, one for each month, and then took some from each third, leaving 60 acorns for each winter month. The squirrel combined the ones it took to eat in the first cold month of spring before plants were in bloom again. How many acorns does the squirrel have to eat at the beginning of spring? Let's answer step by step:
The squirrel split the 210 acorns into thirds, so it had 3 piles of 210 / 3 = 70 acorns. It took 70 - 60 = 10 from each pile. The squirrel will have 3 * 10 = 30 acorns to eat at the beginning of spring. The answer: 30.