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 \(10 \%\) water. How much water should be added to this so that water may be \(20 \%\) 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. \(29 \mathrm{~m}\)