1) If 4% of a number is 30. What is the number? 2) If 10% of a number is 57. What is the number? 3) If 50% of a number is 90. What is the number? 4) If 2% of a number is 79. What is the number? 5) If 30% of a number is 75. What is the number? 6) If 4% of a number is 62. What is the number? Ответи

To find the number in each of these cases, we can use the formula:

\[ \text{Number} = \frac{\text{Given Value}}{\text{Percentage}} \]

where the percentage is written as a decimal. Here are the calculations for each question:

1. If 4% of a number is 30: \[ \text{Number} = \frac{30}{0.04} = 750 \]

2. If 10% of a number is 57: \[ \text{Number} = \frac{57}{0.10} = 570 \]

3. If 50% of a number is 90: \[ \text{Number} = \frac{90}{0.50} = 180 \]

4. If 2% of a number is 79: \[ \text{Number} = \frac{79}{0.02} = 3950 \]

5. If 30% of a number is 75: \[ \text{Number} = \frac{75}{0.30} = 250 \]

6. If 4% of a number is 62: \[ \text{Number} = \frac{62}{0.04} = 1550 \]

So, the answers are:

1. 750
2. 570
3. 180
4. 3950
5. 250
6. 1550