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SS 1 · Senior secondary foundations

SS 1 Mathematics made simple

SS 1 starts Senior Secondary Maths: indices and logarithms, number bases and modular arithmetic, sets, quadratic equations, variation, trigonometric ratios, mensuration and statistics.

MathPlug breaks each topic into short, visual steps and checks every answer with its own maths engine — so the explanations you read are always mathematically correct.

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What you'll learn in SS 1

8 topics across three terms, following the Nigerian (NERDC) Mathematics curriculum. 15 interactive lessons are ready now, with more being added.

First Term

Second Term

Third Term

▶ Green lessons are ready to play now.

Try some SS 1 practice questions

Every answer below was worked out and checked by the MathPlug maths engine. Tap to see the steps.

  1. Question 1

    A trader bought a pair of shoes for ₦5,000 and sold it for ₦5,600. Find the profit per cent.

    • A17%
    • B600%
    • C12%
    • D10.7%
    Show answer and working

    1. Step 1: Find the profit

      ₦5,600 − ₦5,000 = ₦600

    2. Step 2: Divide by the cost price

      6005000 × 100 = 12%

      Why? Profit and loss percentages are always compared with what the trader paid.

    Final answer: 12%

  2. Question 2

    Express 46,240 correct to 2 significant figures.

    • A46,200
    • B46,000
    • C47,000
    • D46
    Show answer and working

    1. Step 1: Keep 2 significant figures

      46,240 → the first 2 digits are 46

    2. Step 2: Round using the next digit

      The next digit is 2.

      It is less than 5, so round down.

    3. Step 3: Fill with zeros

      46,240 ≈ 46,000 (2 s.f.)

      Why? The zeros keep each digit in its correct place value.

    Final answer: 46,000

  3. Question 3

    Solve: 9x − 7 = 38

    • Ax = −5
    • Bx = 45
    • Cx = 319
    • Dx = 5
    Show answer and working

    1. Step 1: Add 7 to both sides

      9x − 7 = 38

      9x − 7 + 7 = 38 + 7

      9x = 45

      Why? We want 9x on its own, so we remove the 7. Whatever we do to one side, we do to the other — like keeping a balance level.

    2. Step 2: Divide both sides by 9

      9x ÷ 9 = 45 ÷ 9

      x = 5

      Why? 9x means 9 × x. Dividing by 9 undoes the multiplication and leaves x alone.

    3. Step 3: Check your answer

      Put x = 5 back in: 9 × 5 − 7 = 38

      ✓ That matches 38, so the answer is right.

    Final answer: x = 5

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