Quantitative Aptitude Quiz For NIACL AO
Directions (1-5): The following table shows the number of employees working in various companies in 4 different years.
Note: T = total employee, M : F = ratio of male and female employees.
Q2. A list was made by listing the number of female employees of all companies in 1992. Somehow the number of female employees of company C was swapped with number of male employees of same company. Find by what number the total number of female employees in all companies differ ?
Q3. In 1993, company A and C undertook a contract to complete a work in 30 days. If in 25 days only 2/3 of work was completed, then how many more women should be hired to complete the work in time ? (only women are working on that work)
Q4. Find the ratio of number of male employee of company C and D together in 1991 and that of company B and E together in 1993 ?
Q6. A cistern can be filled by two pipes filling separately in 12 and 16 minutes respectively. Both pipes are opened together for a certain time but at the same time both pipes were clogged and only 7/8 of full quantity of water flows through the former and only 5/6 through the latter pipe. The obstructions, however, suddenly removed after which the cistern was filled in 3 minutes from that moment. For how long the pipes were clogged?
Q7. A bag has 4 red and 5 black balls. A second bag has 3 red and 7 black balls. One ball is drawn from the first bag and two from the second. The probability that there are two black balls and a red ball is:
Q8. In a bag there are 7 red balls and 5 green balls. Three balls are picked at random. What is the probability that two balls are red, and one ball is green in color?
Q9. Pipe A and B can fill a tank in 20 minutes and 25 minutes respectively. A third pipe C can empty it in 10 minutes. The first two pipes are kept open for 8 minutes in the beginning and then the third pipe is also opened. In what time will the tank become empty?
A can fill (100/20)=5 units in one min.
And B can fill (100/25)=4 units in one min.
Third pipe empties (100/10)= 10 units in one min.
In the beginning the tank filled by (A + B) in 8 minutes = 8 × (5 + 4) = 72 units
Third pipe empties 10 units every hour.
∴ Tank will be emptied in 72 minutes.
Q10. The present ages of Ranjana and Rakhi are in the ratio of 15 : 17 respectively. After 6 years, the respective ratio between the age of Ranjana and Rakhi will be 9 : 10. What will be the age of Ranjana after 6 years ?
Directions (11-15): What will come in place of (?) in the following number series problems?
Q11. 1, 4, 15, 64, 325, ?
∴ ? = 325 × 6 + 6 = 1956
Q12. 100, 121, 144, 169, 196, ?
Q13. 6, 3, 3, 4.5, 9, ?
Q14. 3, 4, 9, 28, 113, ?
Q15. 441, 484, 529, 576, 625, ?