What will come in place of question mark (?) in the following questions
`14400 div 36 + 15600 div 12 + 450 = 1800 + ?`

Options

A. 410
B. 330
C. 390
D. 350

Answer

Let's solve the problem step by step.

### Given Expression:
\[ 14400 \div 36 + 15600 \div 12 + 450 = 1800 + ? \]

### Step 1: Solve the divisions
First, we will perform the division operations in the expression.

1. **Calculate \( 14400 \div 36 \)**:
\[ 14400 \div 36 = 400 \]

2. **Calculate \( 15600 \div 12 \)**:
\[ 15600 \div 12 = 1300 \]

### Step 2: Substitute the results back into the expression
Now we substitute the results of the divisions back into the equation:
\[ 400 + 1300 + 450 = 1800 + ? \]

### Step 3: Add the left side
Next, we will add the values on the left side:
\[ 400 + 1300 = 1700 \]
\[ 1700 + 450 = 2150 \]

### Step 4: Set up the equation
Now we have:
\[ 2150 = 1800 + ? \]

### Step 5: Solve for the question mark
To find the value of the question mark, we will subtract 1800 from both sides:
\[ ? = 2150 - 1800 \]
\[ ? = 350 \]

### Final Answer:
The value that will come in place of the question mark (?) is **350**.

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