Search SchoolNGR

Monday, 15 June 2026
Register . Login

Mathematics Past Questions and Answers

Topic: Number bases

Jamb Mathematics Questions - Number bases

Question 1:
(3.2)2 - (1.8)2 equals
  • A 7.0
  • B 2.56
  • C 13.48
  • D 2.0
  • E 0.07
View Answer & Explanation
Question 2:
In base ten, the number 101101 (base 2) equals
  • A 15
  • B 4
  • C 45
  • D 32
  • E 90
View Answer & Explanation
Question 3:
x is directly proportional to y and inversely proportional to z. If x = 9 when y = 24 and z = 8, what is the value of x when y = 5 and z = 6?
  • A \(\frac{5}{6}\)
  • B 11
  • C 3\(\frac{3}{5}\)
  • D 2\(\frac{1}{2}\)
  • E 1\(\frac{1}{5}\)
View Answer & Explanation
Question 4:
A trader goes to Ghana for y days with y cedis. For the first x days, he spends X cedis per day. The amount he has to spend per day for the rest of his stay is
  • A \(\frac{y(y - x)}{y - x}\) cedis
  • B \(\frac{Yy - Xx)}{y - x}\) cedis
  • C \(\frac{Y - Xy)}{y - x}\) cedis
  • D \(\frac{Y - X}{y - x}\) cedis
  • E \(\frac{Y - Xx}{y - x}\) cedis
View Answer & Explanation
Question 5:
A binary operation \(\otimes\) is defined by \(m \otimes n = mn + m - n\) on the set of real numbers, for all m, n \(\in\) R. Find the value of 3 \(\otimes\) (2 \(\otimes\) 4).
  • A 6
  • B 25
  • C 15
  • D 18
View Answer & Explanation