For every question, four probable answers as (A), (B), (C) and (D) are given. Only one out of these is correct. Choose the correct answer.
Which of the following is not equal to 25?

Options

A. `50 - (100 - 4)`
B. `20 + (20 -4)`
C. `10 + (5 xx 2) + (10-5)`
D. `24 + (2 xx 1)`

Answer

To solve the question "Which of the following is not equal to 25?", we will evaluate each of the four options provided.

Let's denote the options as follows:
1. Option A: \(50 - \frac{100}{4}\)
2. Option B: \(20 + \frac{20}{4}\)
3. Option C: \(10 + (5 \times 2) + (10 - 5)\)
4. Option D: \(24 + 2 \times 1\)

Now, we will evaluate each option step by step.

### Step 1: Evaluate Option A
**Expression:** \(50 - \frac{100}{4}\)

1. Calculate \(\frac{100}{4}\):
\[ \frac{100}{4} = 25 \]
2. Now substitute back into the expression:
\[ 50 - 25 = 25 \]

**Result for Option A:** 25

### Step 2: Evaluate Option B
**Expression:** \(20 + \frac{20}{4}\)

1. Calculate \(\frac{20}{4}\):
\[ \frac{20}{4} = 5 \]
2. Now substitute back into the expression:
\[ 20 + 5 = 25 \]

**Result for Option B:** 25

### Step 3: Evaluate Option C
**Expression:** \(10 + (5 \times 2) + (10 - 5)\)

1. Calculate \(5 \times 2\):
\[ 5 \times 2 = 10 \]
2. Calculate \(10 - 5\):
\[ 10 - 5 = 5 \]
3. Now substitute back into the expression:
\[ 10 + 10 + 5 = 25 \]

**Result for Option C:** 25

### Step 4: Evaluate Option D
**Expression:** \(24 + 2 \times 1\)

1. Calculate \(2 \times 1\):
\[ 2 \times 1 = 2 \]
2. Now substitute back into the expression:
\[ 24 + 2 = 26 \]

**Result for Option D:** 26

### Conclusion
Now we compare the results:
- Option A: 25
- Option B: 25
- Option C: 25
- Option D: 26

The only option that is not equal to 25 is **Option D**.

### Final Answer
**The correct answer is Option D.**

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