JAMB Mathematics questions

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

1. Question 81· Euclidean geometry· JAMB

   The base angles of an isosceles triangle are each 50°. Find the third angle.

   • A130°
   • B50°
   • C100°
   • D80°

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2. Question 82· Euclidean geometry· JAMB

   Find the sum of the interior angles of a hexagon.

   • A1080°
   • B540°
   • C720°
   • D360°

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3. Question 83· Euclidean geometry· JAMB

   

   In the diagram, BC is produced to D. Find the angle marked x.

   • A120°
   • B60°
   • C110°
   • D130°

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4. Question 84· Euclidean geometry· JAMB

   The angles of a quadrilateral are x, 2x, 3x and 4x. Find the largest angle.

   • A36°
   • B108°
   • C144°
   • D120°

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5. Question 85· Euclidean geometry· JAMB

   Two tangents drawn to a circle from an external point are

   • Aperpendicular to each other
   • Bequal in length
   • Cparallel
   • Dunequal

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6. Question 86· Euclidean geometry· JAMB

   Two similar triangles have corresponding sides in the ratio 3 : 5. Find the ratio of their areas.

   • A27 : 125
   • B3 : 5
   • C9 : 25
   • D6 : 10

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7. Question 87· Euclidean geometry· JAMB

   The angle in a semicircle is

   • A180°
   • B90°
   • C60°
   • D45°

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8. Question 88· Euclidean geometry· JAMB

   The interior angles of a polygon add up to 1080°. How many sides has it?

   • A6
   • B7
   • C9
   • D8

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9. Question 89· Euclidean geometry· JAMB

   

   In the diagram, ABCD is a cyclic quadrilateral. Find the angle marked y.

   • A75°
   • B105°
   • C150°
   • D95°

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10. Question 90· Euclidean geometry· JAMB

    The sum of the interior angles of a regular polygon is 1440°. Find each interior angle.

    • A144°
    • B150°
    • C135°
    • D160°

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11. Question 91· Euclidean geometry· JAMB

    Angles subtended by the same arc and lying in the same segment of a circle are

    • Asupplementary
    • Bequal
    • Ccomplementary
    • Dright angles

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12. Question 92· Euclidean geometry· JAMB

    The angle between a tangent to a circle and the radius at the point of contact is

    • A90°
    • B45°
    • C180°
    • D60°

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13. Question 93· Euclidean geometry· JAMB

    A chord 8 cm long is 3 cm from the centre of a circle. Find the radius.

    • A11 cm
    • B4 cm
    • C7 cm
    • D5 cm

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14. Question 94· Euclidean geometry· JAMB

    The vertical angle of an isosceles triangle is 40°. Find each base angle.

    • A50°
    • B40°
    • C140°
    • D70°

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15. Question 95· Euclidean geometry· JAMB

    An angle at the centre of a circle is 80°. The angle subtended by the same arc at the circumference is:

    • A40°
    • B80°
    • C100°
    • D160°

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16. Question 96· Euclidean geometry· JAMB

    Each exterior angle of a regular polygon is 40°. How many sides has the polygon?

    • A10
    • B8
    • C9
    • D12

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17. Question 97· Euclidean geometry· JAMB

    The sum of the exterior angles of any convex polygon is

    • A720°
    • B180°
    • C540°
    • D360°

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18. Question 98· Fractions, decimals, approximations and percentages· JAMB

    Express 7/20 as a decimal.

    • A0.35
    • B0.7
    • C0.035
    • D3.5

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19. Question 99· Fractions, decimals, approximations and percentages· JAMB

    A man spends 2/5 of his salary on rent and 1/4 of the remainder on food. What fraction of his salary is left?

    • A7/20
    • B9/20
    • C11/20
    • D3/20

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20. Question 100· Fractions, decimals, approximations and percentages· JAMB

    Simplify (2/3 + 1/4) ÷ 11/6.

    • A11/12
    • B2/3
    • C1/2
    • D3/4

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    Explanation and discussion