Post Utme Mathematics Past Questions and Answers

Question 531:

Working 5 hours a day, A can Complete a work in 8 days and working 6 hours a day, B can complete the same work in 10 days. Working 8 hours a day, they can jointly complete the work in how many days?

A. 3 days
B. 4 days
C. $4.5$ days
D. $5.4$ days

Question 532:

A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at random from this box. The probability that at least one of these is defective is

A. $4/19$
B. $7/19$
C. $12/19$
D. 21/95

Question 533:

A mixture of 40 liters of milk and water contains $10\mathrm{\%}$ water. How much water should be added to this so that water may be $20\mathrm{\%}$ in the new mixture?

A. $6.5$ liters
B. 5 liters
C. 4 liters
D. $7.5$ liters

Question 534:

Four different electronic devices make a beep after every 30 minutes, 1 hour, $3/2$ hour and 1 hour 45 minutes respectively. All the devices beeped together at 12 noon. They will again beep together at ____________

A. 12 midnight
B. 3 am
C. 6 am
D. 9 am

Question 535:

In a $100\mathrm{m}$ race, A can beat B by $25\mathrm{m}$ and $B$ can beat $C$ by $4\mathrm{m}$. In the same race, A can beat $C$ by?

A. $21\mathrm{m}$
B. $26\mathrm{m}$
C. $28\mathrm{m}$
D. $29\mathrm{m}$