Mathematical puzzles for call center interviews

1. A boy multiplied a number with 10 and got 100. If he divided it by 10, what would be the answer? Answer is 1
2. If a 12 shell cupboard requires 18 ft of wall space then how much wall space would a 30 cup shelf require? Answer is 45
3. 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? Answer is $1050
4. 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. Answer is 18hrs
5. 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? Answer is 60000 sqft
6. 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. Answer is 150,000
7. 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? Answer is 420
8. 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? Answer is $32000
9. 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? Answer is 33%
10. If a card punch operator can process 80 cards in half an hour How many cards can this process in 7hr30min? Answer is 1200
11. 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? Answer is 5/8.