Teacha
  • Courses
  • Mock Exams
  • For Tutors
  • For Schools
  • Pricing
Log InStart Free
  1. Past Questions
  2. /
  3. JAMB
  4. /
  5. Mathematics
  6. /
  7. 2020
  8. /
  9. Q0
Question 0

The mean age group of some students is 15years. When the age of a teacher, 45 years old, is added to the ages of the students, the mean of their ages become 18 years. Find the number of students in the group. 

  • A.7
  • B.9
  • C.15
  • D.42
  • E.
Objective

Question details

Exam body
JAMB
Subject
Mathematics
Year
2020
Question no.
#0
Type
Objective
Previous · Q0The sum of the interior angle of pentagon is 6x + 6y. Find y in terms of x. Next · Q0 A surveyor walks 500m up a hill which slopes at an angle of 30\(^o\). Calculate…

More from this paper

  • Q0Evaluate (212)\(_3\) - (121)\(_3\) + (222)\(_3\)
  • Q0Factorise (4a + 3) \(^2\) - (3a - 2)\(^2\)
  • Q0Find all median of the numbers 89, 141, 130, 161, 120, 131, 131, 100, 108 and…
  • Q0Find all real number x which satisfy the inequality \(\frac{1}{3}\) (x + 1) - 1…
  • Q0Reach each number to two significant figures and then evaluate \(\frac{0.02174…
  • Q0Four boys and ten girls can cut a field first in 5 hours. If the boys work at…
See all Mathematics 2020 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