问题


There is a single choice question about high school mathematics. Answer the question by replying A, B, C or D.
Question: An amoeba is placed in a puddle one day, and on that same day it splits into two amoebas. The next day, each new amoeba splits into two new amoebas, and so on, so that each day every living amoeba splits into two new amoebas. After one week, how many amoebas are in the puddle? (Assume the puddle has no amoebas before the first one is placed in the puddle.)
A. 256
B. 1024
C. 64
D. 128
Answer:

答案

模型 模型答案 正确答案
金声玉亮2.0

D. 128
D
deepseekr1

The amoeba population doubles each day starting from 1. On day 1, it becomes \(2^1 = 2\). Each subsequent day, the number doubles again. After 7 days (one week), the population is \(2^7 = 128\).

**Answer:** D. 128
D
gpto1 D D
GPT-4o To solve the problem, let's analyze the process of amoeba splitting:

1. **Day 1:** Start with 1 amoeba. It splits into 2 amoebas.
2. **Day 2:** Each of the 2 amoebas splits into 2 more, resulting in \(2 \times 2 = 4\) amoebas.
3. **Day 3:** Each of the 4 amoebas splits into 2 more, resulting in \(4 \times 2 = 8\) amoebas.
4. **Day 4:** Each of the 8 amoebas splits into 2 more, resulting in \(8 \times 2 = 16\) amoebas.
5. **Day 5:** Each of the 16 amoebas splits into 2 more, resulting in \(16 \times 2 = 32\) amoebas.
6. **Day 6:** Each of the 32 amoebas splits into 2 more, resulting in \(32 \times 2 = 64\) amoebas.
7. **Day 7:** Each of the 64 amoebas splits into 2 more, resulting in \(64 \times 2 = 128\) amoebas.

Therefore, after one week, there are 128 amoebas in the puddle.

Answer: D
D
llama3.1-70B-Instruct

B
D
llama3.1-405B-Instruct

D. 128
D
DeepSeek-Coder-V2 A. 256 D
Qwen2-72B-Instruct B. 1024 D
baichuan4 B. 1024 D
doubao On the first day, there is 1 amoeba. On the second day, each of the 1 amoeba splits into 2, so there are 2 amoebas. On the third day, each of the 2 amoebas splits into 2, so there are 2×2=4 amoebas. On the fourth day, each of the 4 amoebas splits into 2, so there are 4×2=8 amoebas. On the fifth day, each of the 8 amoebas splits into 2, so there are 8×2=16 amoebas. On the sixth day, each of the 16 amoebas splits into 2, so there are 16×2=32 amoebas. On the seventh day, each of the 32 amoebas splits into 2, so there are 32×2=64 amoebas. So the answer is C. D
minimax The amoeba population doubles each day. Starting with one amoeba on the first day, the population will be:

Day 1: 2^0 = 1 amoeba
Day 2: 2^1 = 2 amoebas
Day 3: 2^2 = 4 amoebas
Day 4: 2^3 = 8 amoebas
Day 5: 2^4 = 16 amoebas
Day 6: 2^5 = 32 amoebas
Day 7: 2^6 = 64 amoebas

After one week (7 days), there will be 64 amoebas in the puddle.

The correct answer is:
C. 64
D
kimi The amoeba splits into two every day. This is an example of exponential growth. If we start with one amoeba, the number of amoebas after each day can be represented as \(2^n\), where \(n\) is the number of days.

Since the amoeba splits once a day, after one week (7 days), the number of amoebas will be \(2^7\).

\[2^7 = 128\]

So the answer is D. 128.
D
wenxinyiyan D. 128

Explanation:
This is an exponential growth problem. Each day, the number of amoebas doubles. We can represent this growth with a power of 2, where the exponent represents the number of days.

On the first day, there is 1 amoeba, which splits into 2 amoebas on the second day. So, after 1 day, there are $2^1 = 2$ amoebas.

On the second day, each of the 2 amoebas splits, resulting in 4 amoebas. So, after 2 days, there are $2^2 = 4$ amoebas.

Continuing this pattern, after 3 days there are $2^3 = 8$ amoebas, after 4 days there are $2^4 = 16$ amoebas, and so on.

Since a week has 7 days, we need to find the number of amoebas after 7 days. Using the exponential growth model, this is $2^7 = 128$ amoebas.
D
zhipu To determine the number of amoebas after one week, we need to understand the growth pattern of the amoebas.

- On Day 1, there is 1 amoeba which splits into 2 amoebas.
- On Day 2, each of these 2 amoebas splits into 2 new amoebas, resulting in \( 2^2 = 4 \) amoebas.
- On Day 3, each of these 4 amoebas splits into 2 new amoebas, resulting in \( 2^3 = 8 \) amoebas.
- This pattern continues such that on Day \( n \), there are \( 2^n \) amoebas.

Since a week has 7 days, on Day 7, the number of amoebas will be \( 2^7 \).

Calculating \( 2^7 \):
\[ 2^7 = 128 \]

Thus, the number of amoebas in the puddle after one week is 128.

The correct answer is:
D. 128
D
gpto1 D D
deepseekv3 The problem describes a situation where the number of amoebas doubles every day. Let's break it down step by step:

1. **Day 0 (Initial Day):**
- There is **1 amoeba** in the puddle.

2. **Day 1:**
- The amoeba splits into **2 amoebas**.

3. **Day 2:**
- Each of the 2 amoebas splits into 2, resulting in **4 amoebas**.

4. **Day 3:**
- Each of the 4 amoebas splits into 2, resulting in **8 amoebas**.

5. **Day 4:**
- Each of the 8 amoebas splits into 2, resulting in **16 amoebas**.

6. **Day 5:**
- Each of the 16 amoebas splits into 2, resulting in **32 amoebas**.

7. **Day 6:**
- Each of the 32 amoebas splits into 2, resulting in **64 amoebas**.

8. **Day 7:**
- Each of the 64 amoebas splits into 2, resulting in **128 amoebas**.

After one week (7 days), there are **128 amoebas** in the puddle.

**Answer:** D. 128
D