Direction: In the following number series questions one number is wrong. Find out the wrong number.
2 4 11 37 151 771 4633

Options

A. 151
B. 4
C. 37
D. 771

Answer

To find the wrong number in the series: 2, 4, 11, 37, 151, 771, 4633, we will analyze the pattern step by step.

### Step 1: Identify the pattern
We will look for a consistent pattern in the series.

1. Start with the first number: 2.
2. Multiply it by 1 and add 2:
\[ 2 \times 1 + 2 = 4 \]

### Step 2: Continue the pattern
Next, we take the second number (4) and apply the same logic:
1. Multiply 4 by 2 and add 3:
\[ 4 \times 2 + 3 = 8 + 3 = 11 \]

### Step 3: Continue with the next number
Now, take the third number (11):
1. Multiply 11 by 3 and add 4:
\[ 11 \times 3 + 4 = 33 + 4 = 37 \]

### Step 4: Continue with the next number
Now, take the fourth number (37):
1. Multiply 37 by 4 and add 5:
\[ 37 \times 4 + 5 = 148 + 5 = 153 \]

### Step 5: Check the next number
Now, take the fifth number (151):
1. Multiply 151 by 5 and add 6:
\[ 151 \times 5 + 6 = 755 + 6 = 761 \]

### Step 6: Check the next number
Now, take the sixth number (771):
1. Multiply 771 by 6 and add 7:
\[ 771 \times 6 + 7 = 4626 + 7 = 4633 \]

### Conclusion
From the calculations, we see that the expected number after 37 should be 153, but instead, we have 151. Therefore, the wrong number in the series is **151**.