Teacha
  • Courses
  • Mock Exams
  • For Tutors
  • For Schools
  • Pricing
Log InStart Free
  1. Past Questions
  2. /
  3. UNN
  4. /
  5. Mathematics
  6. /
  7. 2015/2016
  8. /
  9. Q8
Question 8

The binary operations . and x are defined over the set of real numbers by a . b - ab - b - 1 and a x b - ab + b - 2. Find the value of 3 x (4 . 5)

  • A.42
  • B.54
  • C.57
  • D.60
Objective

Question details

Exam body
UNN
Subject
Mathematics
Year
2015/2016
Question no.
#8
Type
Objective
Previous · Q7A photograph is to be taken of five people including a married couple. If the… Next · Q9 A pump P can fill a water tank in 5h. With a second pump Q also operating, the…

More from this paper

  • Q2A regular polygon with (2m + 1) sides has each interior angle equal to 144°. The…
  • Q3An observer standing on the top of a building 40m high views a stone on the…
  • Q4If the mass of a solid metal sphere of radius 3cm is 9kg, the mass of a…
  • Q5X is a variable point which is equidistant from two parallel lines PQ and RS of…
  • Q6The average age of the three children in a family is 9 years. If the average age…
  • Q10If x - 1, x, x + 2 form a geometric sequence, then the value of x is
See all Mathematics 2015/2016 questions
Teacha

Africa's learning & exam readiness platform. Built for students, tutors, and schools.

Platform

  • Courses
  • Mock Exams
  • Past Questions

For You

  • I'm a Tutor
  • I'm a School
  • Pricing

© 2025 Teacha. Built for African learners, tutors, and schools. Teacha is not affiliated with WAEC, NECO, or JAMB. All past questions are sourced from publicly available materials.

Privacy PolicyTerms of UseCookie Policy