I can read the mathematical content from the image to help with solutions. Let me analyze the questions and solve them one by one:

8) Write as a decimal "Thirty and one-tenth":
Options:
(a) 30.2
(b) 3.1
(c) 31.2
(d) 30.1

Solution:
"Thirty and one-tenth" means $30 + 0.1 = 30.1$.
Correct Answer: (d) 30.1

9) The angle measure between the hands of the clock in the adjoining figure is:
Options:
(a) 90°
(b) 30°
(c) 180°
(d) 60°

The clock shows 1:00 p.m.. The angle between the hour hand and minute hand is $30^\circ \times \text{number of hours between them}$.

From 12 to 1, there is a 1-hour difference:
$30^\circ \times 1 = 30^\circ$.
Correct Answer: (b) 30°

10) A traffic policeman is standing looking East. In which direction will he look if he turns to his left three right angles?
Options:
(a) North
(b) South
(c) West
(d) East

Solution:
1 right angle = $90^\circ$.
3 right angles = $3 \times 90^\circ = 270^\circ$.

If he starts facing East and turns 270° to the left, he will end up facing North.
Correct Answer: (a) North

Let me know if you'd like further details or explanations! Here are 5 related questions to expand understanding:

1. What is the decimal form of "Forty-five and two-tenths"?
2. How would you calculate the angle between clock hands at 3:15?
3. If someone faces South and turns left by two right angles, which direction will they face?
4. Convert $3 \frac{1}{5}$ into a decimal.
5. Explain how the clock angle changes when the time is 9:15.

Tip: To calculate clock angles, always remember the formula:
$\text{Angle} = |30 \times \text{Hour} - \frac{11}{2} \times \text{Minutes}|$.