JAMB Mathematics questions

497 questions with answers and explanations. Tap an option to check yourself.

1. Question 421· Sets· JAMB

   If A = {1, 2, 3, 4} and B = {3, 4, 5}, find A ∩ B′ (the elements of A that are not in B).

   • A{5}
   • B{1, 2}
   • C{3, 4}
   • D{1, 2, 5}

   Show answer

   Answer: B. {1, 2}

   Explanation and discussion

2. Question 422· Statistics· JAMB

   Find the range of 15, 22, 8, 31 and 19.

   • A16
   • B31
   • C23
   • D8

   Show answer

   Answer: C. 23

   Explanation and discussion

3. Question 423· Statistics· JAMB

   A cumulative frequency curve is called

   • Aan ogive
   • Ba histogram
   • Ca bar chart
   • Da pie chart

   Show answer

   Answer: A. an ogive

   Explanation and discussion

4. Question 424· Statistics· JAMB

   The mean of five numbers is 8. Four of them are 6, 7, 9 and 10. Find the fifth number.

   • A9
   • B6
   • C10
   • D8

   Show answer

   Answer: D. 8

   Explanation and discussion

5. Question 425· Statistics· JAMB

   Find the variance of 2, 4 and 6.

   • A2
   • B4
   • C8/3
   • D16/3

   Show answer

   Answer: C. 8/3

   Explanation and discussion

6. Question 426· Statistics· JAMB

   Find the median of 3, 8, 1, 9, 5, 7, 2.

   • A4
   • B7
   • C3
   • D5

   Show answer

   Answer: D. 5

   Explanation and discussion

7. Question 427· Statistics· JAMB

   Find the range of 12, 7, 19, 3, 10.

   • A16
   • B19
   • C9
   • D12

   Show answer

   Answer: A. 16

   Explanation and discussion

8. Question 428· Statistics· JAMB

   In a test, 2 students scored 1, 3 students scored 2 and 5 students scored 3. Find the mean score.

   • A2.5
   • B2
   • C3
   • D2.3

   Show answer

   Answer: D. 2.3

   Explanation and discussion

9. Question 429· Statistics· JAMB

   Find the mean deviation of 2, 4 and 6.

   • A4/3
   • B2
   • C8/3
   • D0

   Show answer

   Answer: A. 4/3

   Explanation and discussion

10. Question 430· Statistics· JAMB

    Find the standard deviation of 2, 4, 6 and 8.

    • A2
    • B5
    • C√5
    • D√20

    Show answer

    Answer: C. √5

    Explanation and discussion

11. Question 431· Statistics· JAMB

    Find the standard deviation of 3, 5 and 7, correct to 2 decimal places.

    • A2.67
    • B1.63
    • C2.00
    • D4.00

    Show answer

    Answer: B. 1.63

    Explanation and discussion

12. Question 432· Statistics· JAMB

    The mean of five numbers is 12. When one number is removed, the mean of the rest is 10. Find the number removed.

    • A2
    • B20
    • C12
    • D22

    Show answer

    Answer: B. 20

    Explanation and discussion

13. Question 433· Statistics· JAMB

    The mean of 10 numbers is 6. When one number, 15, is removed, what is the mean of the remaining numbers?

    • A5.5
    • B4.5
    • C6
    • D5

    Show answer

    Answer: D. 5

    Explanation and discussion

14. Question 434· Statistics· JAMB

    The mean of 2, 4, x, 7 and 9 is 6. Find x.

    • A30
    • B6
    • C5
    • D8

    Show answer

    Answer: D. 8

    Explanation and discussion

15. Question 435· Statistics· JAMB

    Find the mean of the first five positive even numbers.

    • A6
    • B5
    • C8
    • D10

    Show answer

    Answer: A. 6

    Explanation and discussion

16. Question 436· Statistics· JAMB

    In a histogram, the frequency of each class is proportional to the

    • Awidth of its bar only
    • Bheight of its bar only
    • Carea of its bar
    • Dnumber of bars

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    Answer: C. area of its bar

    Explanation and discussion

17. Question 437· Statistics· JAMB

    Find the median of this distribution: score 1, 2, 3, 4 with frequencies 3, 5, 4, 2.

    • A3
    • B2
    • C2.5
    • D4

    Show answer

    Answer: B. 2

    Explanation and discussion

18. Question 438· Statistics· JAMB

    The scores of five students are 6, 8, 8, 10 and 13. Find the mode and the range.

    • AMode 8, range 9
    • BMode 8, range 7
    • CMode 10, range 7
    • DMode 9, range 8

    Show answer

    Answer: B. Mode 8, range 7

    Explanation and discussion

19. Question 439· Statistics· JAMB

    Which measure of central tendency is most affected by extreme values?

    • Athe median
    • Bthe mean
    • Cthe mode
    • Dthe quartile

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    Answer: B. the mean

    Explanation and discussion

20. Question 440· Statistics· JAMB

    Find the mode of 2, 3, 3, 4, 4, 4, 5, 5.

    • A3.75
    • B3
    • C5
    • D4

    Show answer

    Answer: D. 4

    Explanation and discussion