Solve the following questions: 1. Write "twenty-three point seven five million" in figures. 2. Michael Jackson died in 2009 aged 50. In what year was he born? 3. 20 pupils were asked about their favou

To write "twenty-three point seven five million" in figures, we multiply 23.75 by 1,000,000.

The number in figures is $\boxed{\text{23,750,000}}$.

Michael Jackson died in 2009 at the age of 50. To find his birth year, subtract his age from the death year.

The year he was born is $\boxed{\text{1959}}$.

Total pupils = 20.
Pupils who love football (F) = 13.
Pupils who love handball (H) = 8.
Pupils who love both (F and H) = 5.

Pupils who love only football = $13 - 5 = 8$.
Pupils who love only handball = $8 - 5 = 3$.
Pupils who love at least one sport = (only F) + (only H) + (both F and H)

Pupils who love neither sport = Total pupils - Pupils who love at least one sport

Percentage of pupils who love neither sport = $\frac{\text{Number who love neither}}{\text{Total pupils}} \times 100\%$

The percentage of pupils who love neither football nor handball is $\boxed{\text{20\%}}$.

Quarter past 12 noon is 12:15.
The minute hand moves $360^\circ$ in 60 minutes, so $6^\circ$ per minute. At 15 minutes, its angle from 12 is:

The hour hand moves $360^\circ$ in 12 hours, so $30^\circ$ per hour. It also moves $0.5^\circ$ per minute. At 12:15, its angle from 12 is:

Since $360^\circ$ is a full circle, the hour hand is at $7.5^\circ$ from the 12 mark.
The angle between the minute hand and the hour hand is the absolute difference:

The angle represented is \boxed{\text{82.5^\circ}}.

To convert the denary number 62 to a hexal (base 6) number, we perform successive divisions by 6 and record the remainders.

Reading the remainders from bottom to top, the hexal number is $142_6$.
62 in hexal is $\boxed{\text{142}_6}$.

Let $V$ be the total volume of the drum in liters.
Initially, the drum is $\frac{4}{5}$ full, so the volume of water is $\frac{4}{5}V$.
After withdrawing 60 liters, the drum is $\frac{1}{2}$ full, so the volume of water is $\frac{1}{2}V$.
We can set up the equation:

To solve for $V$, first move the $V$ terms to one side:

Find a common denominator for the fractions (which is 10):

Multiply both sides by $\frac{10}{3}$:

The drum can hold $\boxed{\text{200 liters}}$.

The man sold the article for 38,400 FRS and made a loss of 20%. This means the selling price (SP) is 80% of the cost price (CP).

To gain 30%, the new selling price (New SP) should be 130% of the cost price.

He was supposed to sell it for $\boxed{\text{62,400 FRS}}$.

A score is 20.
Half a dozen is 6.
To find what percentage of a score is half a dozen:

Half a dozen is $\boxed{\text{30\%}}$ of a score.

Johnson's mother gave birth to his junior brother in 2018. At that time, Johnson was 9 years old.
The age difference between Johnson and his brother is constant.
Age difference = Johnson's age when brother was born = 9 years.
If the baby (junior brother) is 9 years old today, Johnson's current age would be $9 + 9 = 18$ years.
The difference in their ages is $\boxed{\text{9 years}}$.

Number of seats in the bus = 70.
The bus is full, so there are 70 passengers.
Each passenger paid 7,000 FRS.
Total amount raised = Number of passengers $\times$ Fare per passenger

The amount raised from all the passengers is $\boxed{\text{490,000 FRS}}$.