Operational Mathematics Interview Questions & Answers:

1. In what ways do you use math in your daily life?

Since I am at college to study mathematics I would say that my daily life revolves around mathematics.

2. What types of math do you use? Re: Calculus, Algebra, Fractions?

Every type. I am in calculus right now and it uses every time of mathematics that I have leaned previously.

3. What types of tools or measuring devices do you use related to math?

No devices use for measuring in math.

4. A boy multiplied a number with 10 and got 100. If he divided it by 10, what would be the answer?

One.

5. If a 12 shell cupboard requires 18 ft of wall space then how much wall space would a 30 cup shelf require?

45

6. The average salary of three employee is $950 per week. If one employee earns $1150 and other earns $650 rupees, how much will third be earn?

1050

7. During a given week a programmer spend 1/4 of his time preparing charts,3/8 of his time for coding,rest of his time for debugging the programs.If he had 48 hrs during the week how many hours did he spend debugging the program

18hrs

8. A 16 story building has 12000ft on each floor. Company A rents 7 floors and company B rents 4 floors. What is the number of square feet of unrented floor space?

60000 sqft

9. A man owns 2/3 of a computer service buroue business and sells 3/4 of his share for $75000.What is the value of the business?

150,000

10. A computer printer produces 176400 lines in a given day. If the printer is in operation for 7 hrs during the day how many lines did it print per minute?

420

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11. From its total income a company spent $20000 for advertising, half of the remainder on bonuses and had $6000 left.What was the total income?

$32000

12. In a certain company 20% of the men and 40% of the women attended the annual company picnic. If 35% of all the employees are men .What % of all the employee went to the picnic?

33%

13. If a card punch operator can process 80 cards in half an hour How many cards can this process in 7hr 30min?

1200

14. In a computer tape library there are two racks with 40 tapes per rack.In a given day 30 tapes are in use . What fraction remains in the rack?

5/8

15. In a normal distribution, approximately what percentage of the cases, to the nearest whole number, falls within 4 standard deviations of the mean:

1. 68%
2. 100%
3. 99%
4. 75%

Answer: B

16. Continuing up the number sequence of natural numbers, prime numbers become which of the following:

1. non-existent at a certain point
2. all even after a certain point
3. less and less frequent
4. more frequent

Answer: C

17. Which of the following properties would you use to compute the chances of rolling either a 7 or an 11 with a pair of dice:

1. multiplicative
2. conditional
3. independent
4. additive

Answer: D

18. The surface of a sphere subtends a solid angle of what amount at its center:

1. π
2. 2π
3. 4π
4. ½ π

Answer: C

19. Assuming a year in a dogs life is equivalent to 7 years of a humans life, what is 1 hour of a dogs life approximately equivalent to in a humans life?

1. 3 ½ hours
2. 7 hours
3. 5 hours
4. 4 ½ days

Answer: B

20. Which of the following is the mathematical term for a radical that expresses an irrational number:

1. turk
2. radicand
3. finical
4. surd

Answer: D

21. Systematic random samp ling is to be used to select 5 addresses from an ordered list containing 500 addresses. A 1- in-100 systematic sample is used to select the 5 addresses. What is the chance that any specific address will be chosen:

1. 1/5
2. 1/100
3. 5/100
4. 5

Answer: B

22. Which of the following mathematicians is responsible for the Cartesian plane that is also known as the rectangular coordinate system:

1. Pythagoroas
2. Rene Descartes
3. Kirk Godel
4. Fredric Gauss

Answer: B

23. Which of the following does NOT yield a periodic non-terminating decimal:

1. 5/6
2. 1/27
3. 1/18
4. 7/8

Answer: D

24. In a simple random sample:

1. response bias will be small
2. non-response bias will be small
3. any two samples of the same size will have the same cha nce of being drawn
4. each subject is asked every question and random responses are allowed

Answer: C

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25. A person with lung cancer is given an MRI. Four radiologists examine each MRI independently. If each specialist can detect lung cancer with 80% accuracy, what is the probability that at least one of them will detect cancer in this patient:

1. 0.998
2. 0.01
3. 0.25
4. 0.8

Answer: A