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Operational Mathematics Interview Questions & Answers:

1. Rounded off to the nearest whole year, how many years would it take for your money to double in an investment that was increasing with an annual compound rate of 3.5%?

20 years

2. In statistics, what is the common term for the square root of the variance?

standard deviation

3. What is the greatest common divisor for the numbers 102 and 30?

6

4. What is the mean for the following data set of 5 numbers:

84, 50, 73, 27, 16

Answer: 50

5. What is the sum of the internal angles of a pentagon:

540°

6. If perfect numbers, except 6, can be expressed by the sum of the cubes of an unbroken sequence of consecutive odd integers, what are the consecutive odd integers which, when cubed, give the perfect number 28?

13 + 33

7. What is the cube root of 729?

9

8. How many degrees are there in o radians:

180o

9. If you start with 1 bacterium and double the number every 15 minutes, how many bacteria will you have at the end of 3 hours and 45 minutes?

32,768

10. According to Set Theory, sets that do NOT contain themselves are typically referred to as:

normal sets

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