38th Bcs preliminary

21.

1.

1

2.

2

3.

3

4.

4
Answer
22.

1.

1

2.

2

3.

3

4.

4
Answer
23.

1. (1, 2)

1

2. (0, 2)

2

3. (1, 3)

3

4. (0, 1)

4
Answer
24.

1. 45°

1

2. 22.5°

2

3. 30°

3

4. 60°

4
Answer
25.

1. 128

1

2. 64

2

3. 32

3

4. 256

4
Answer