QuestionAugust 26, 2025

13. Higher Order Thinking Kyra has a rock collection. When she puts her rocks into 2 equal piles, there are no rocks left over. When she puts her rocks into 3 equal piles, there are still no rocks left over. When she puts her rocks into 4 equal piles, there are still no rocks left over. How many rocks could Kyra have?

13. Higher Order Thinking Kyra has a rock collection. When she puts her rocks into 2 equal piles, there are no rocks left over. When she puts her rocks into 3 equal piles, there are still no rocks left over. When she puts her rocks into 4 equal piles, there are still no rocks left over. How many rocks could Kyra have?
13. Higher Order Thinking Kyra has a rock
collection. When she puts her rocks into
2 equal piles, there are no rocks left over.
When she puts her rocks into 3 equal
piles, there are still no rocks left over.
When she puts her rocks into 4 equal
piles, there are still no rocks left over.
How many rocks could Kyra have?

Solution
4.7(193 votes)

Answer

Kyra could have 12, 24, 36, 48, ... rocks. Explanation 1. Identify the condition for divisibility Kyra's total number of rocks must be divisible by 2, 3, and 4. 2. Find the least common multiple (LCM) The LCM of 2, 3, and 4 is calculated using prime factorization: 2^2 \times 3 = 12. 3. Determine possible quantities Kyra could have any multiple of 12 rocks.

Explanation

1. Identify the condition for divisibility<br /> Kyra's total number of rocks must be divisible by 2, 3, and 4.<br /><br />2. Find the least common multiple (LCM)<br /> The LCM of 2, 3, and 4 is calculated using prime factorization: $2^2 \times 3 = 12$.<br /><br />3. Determine possible quantities<br /> Kyra could have any multiple of 12 rocks.
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