I decade=____millennium

Options

A. `1/100`
B. `1/10`
C. 100
D. 1000

Answer

To solve the question "1 decade = ____ millennium," we will follow these steps:

### Step 1: Understand the definitions
- A **decade** is a period of 10 years.
- A **millennium** is a period of 1000 years.

### Step 2: Set up the relationship
We need to find out how many millennia are in one decade. We can express this relationship mathematically.

### Step 3: Convert decades to years
Since 1 decade = 10 years, we can express this as:
\[ 1 \text{ decade} = 10 \text{ years} \]

### Step 4: Convert millennia to years
Since 1 millennium = 1000 years, we can express this as:
\[ 1 \text{ millennium} = 1000 \text{ years} \]

### Step 5: Set up the ratio
Now, we can set up a ratio to find how many millennia are in a decade:
\[ \frac{1 \text{ millennium}}{1 \text{ decade}} = \frac{1000 \text{ years}}{10 \text{ years}} \]

### Step 6: Simplify the ratio
Now, simplify the fraction:
\[ \frac{1000}{10} = 100 \]
This means that:
\[ 1 \text{ millennium} = 100 \text{ decades} \]

### Step 7: Find the reciprocal
To find out how many millennia are in one decade, we take the reciprocal of the above result:
\[ 1 \text{ decade} = \frac{1}{100} \text{ millennium} \]

### Final Answer
Thus, the answer is:
\[ 1 \text{ decade} = \frac{1}{100} \text{ millennium} \]

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