WAEC · NECO · JAMB  |  SS1 to SS3

Understand the why. Master the how.

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Circle theorems · SS2Drag the gold point
130°65°
Anywhere on this arc the angle is 65°, and the angle at the centre is always double: the angle at the centre is twice the angle at the circumference.
Probability · SS2Press “Pick a ball”
Next pick:red 510green 310blue 210
A bag holds 5 red, 3 green and 2 blue balls. Before anything is picked, the chance of red is 5 out of 10.
Quadratic graphs · SS2Drag the gold turning point
2468−2246x
The minimum point is (3, −1). The curve crosses the x-axis twice, so x² − 6x + 8 = 0 has two roots: x = 2 and x = 4.
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WAEC 2014 · Paper 2 · Question 10(a)Quadratic equations

Solve: (x−2)(x−3)=12(x - 2)(x - 3) = 12.

Type the numbers any way you like: “x = 4 or x = −2”, “4, −2” or “−2 and 4”.

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Write 96°, 2/3 or x² − 3x + 2. We check the maths, not the spelling, and tell you straight away. Drawings and proofs you check against the model answer.

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