Number of significant number will be in following numbers :
(a) 161 cm
(b) 0.0161
( c) 1.61

Options

A. 3, 3, 3
B. 3, 4, 3
C. 3, 2, 3
D. 3, 4, 4

Answer

To determine the number of significant figures in the given numbers, we will analyze each number step by step.

### Step 1: Analyze 161 cm
- The number 161 consists of three digits: 1, 6, and 1.
- All non-zero digits are considered significant.
- Therefore, 161 has **3 significant figures**.

### Step 2: Analyze 0.0161
- The number 0.0161 has leading zeros (0.0) before the first non-zero digit (1).
- Leading zeros are not considered significant.
- The significant figures are the digits 1, 6, and 1.
- Therefore, 0.0161 has **3 significant figures**.

### Step 3: Analyze 1.61
- The number 1.61 consists of three digits: 1, 6, and the trailing zero after the decimal point.
- All non-zero digits and any zeros between significant digits or after a decimal point are considered significant.
- Therefore, 1.61 has **3 significant figures**.

### Conclusion
- The significant figures for the three numbers are:
- (a) 161 cm: **3 significant figures**
- (b) 0.0161: **3 significant figures**
- (c) 1.61: **3 significant figures**

Thus, the final answer is **3, 3, 3**.

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