Post Utme Federal Scholarship Board Mathematics Past Questions and Answers

Question 11:

How many numbers are there in all from 4000 to 4999 (both 4000 and 4999 included. having at least one of their digits repeated?

A. 216
B. 356
C. 496
D. 504

Question 12:

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 13:

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 14:

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 15:

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