After deducting 1600 yuan from her salary in February this year, Liu Hong's mother paid the personal income tax of 10 yuan at the rate of 5%. What is the pre-tax salary in Liu Hong in February this year?

Solution:

Salary after deducting 1600 yuan:10.2475% = 200 yuan.

Liu Hong's pre-tax salary in February this year was: 1600+200 = 1800 yuan.

Dahua Garment Factory plans to produce 3,248 suits this year, and actually completed 37.5% in the first quarter. According to this calculation, the task can be completed in a few months.

Solution:

In fact, 1 ÷ 37.5% = 8/3 quarters can complete the task.

1 quarter is 3 months, so the actual 3× 8/3 = 8 months can complete the task.

The younger brother and younger brother are 35 years old. My brother is three years older than my brother. How old are brother and younger brother?

Solution:

Elder brother is: (35+3) ÷ 2 = 19 years old.

Brother is: 19-3 = 16 years old.