## Tangalese People Non-Toxic

The following three statements are true:

Tangalese people are non-toxic.
No person is a dingbat who can dance the hustle.
Non-toxic persons are dingbats.

Which of the following are true?

1. Dingbats are Tangalese.
2. Some Tangalese can dance the hustle.
3. A person who cannot dance the hustle is toxic.
4. No Tangalese person can dance the hustle.

## Yaks, Blats, and Blobs

Given the two hypotheses:

1. Some yaks are not blats and
2. No blats are blobs,

if “some” means “at least one,” we can conclude that:

1. Some yaks are not blobs.
2. Some blobs are not yaks.
3. No yak is a blob.
4. Some yaks are blobs.
5. I, II, III, and IV are not deducible from the given statements.

## Semi-Elliptical Arch

The arch of a stone bridge has the form of a semi-ellipse. The straight horizontal span is 40 meters and the maximum height between the arch and the span is 10 meters. Find the height, in meters, of the arch 10 meters from one end of the span.

1. 5
2. 5√3
3. 2.5
4. 7
5. 8 2/3

## Salary = f(n students)

Many years ago a teacher’s salary was based on the number of students he had. Suppose a salary of \$60 per month was to be paid for 50 students and \$50 a month for 30 students. If the actual enrollment was 45 students, what should the teacher be paid?