To determine the correct dictionary order, we compare the words letter by letter.

Dictionary Ordering Strategy

We examine the words based on their alphabetical sequence:

1. Compare the first letter of each word.
2. If the first letters are the same, compare the second letters, and so on.
3. Continue this comparison until a difference is found or one word ends.

Word Comparison

The given words are:

• 4. inert
• 2. insert
• 1. inside
• 3. insist
• 5. investigate

Step 1: Initial Comparison

All words start with 'i'.

Step 2: Third Letter Comparison

• inert (inert)
• insert (insert)
• inside (inside)
• insist (insist)
• investigate (investigate)

Comparing the third letters (e, s, s, s, v): 'e' comes first, so 'inert' (4) is the first word.

Next, 's' comes before 'v'. So, the words starting with 'ins' (insert, inside, insist) come before 'investigate' (5).

Current order starts with: 4, ... , 5

Step 3: Ordering 'ins' words

Compare 'insert', 'inside', 'insist'.

• insert (insert)
• inside (inside)
• insist (insist)

Comparing the fourth letters (e, i, i): 'e' comes first. So, 'insert' (2) is the next word after 'inert'.

Current order: 4, 2, ... , 5

Step 4: Ordering 'insi' words

Compare 'inside' and 'insist'.

• inside (inside)
• insist (insist)

Comparing the fifth letters (d, s): 'd' comes before 's'. So, 'inside' (1) comes before 'insist' (3).

Current order: 4, 2, 1, 3, ...

Step 5: Final Order

Combining all comparisons, the order is: inert (4), insert (2), inside (1), insist (3), investigate (5).

The correct sequence of numbers is 4, 2, 1, 3, 5.