Diese Aufgaben gibt es in ihrer Originalsprache.

1. Thema: Number

   1. Find the LCM of 4, 6 and 8.

   A12B24C48D96
   Lösung

   B. 24

   • Multiples of 8: 8, 16, 24...
   • 24 is the first multiple of 8 that is also divisible by 4 and 6.

2. Thema: Fractions

   2. Simplify 3/4 + 1/6.

   A4/10B11/12C2/5D5/6
   Lösung

   B. 11/12

   • The common denominator of 4 and 6 is 12.
   • 3/4 = 9/12 and 1/6 = 2/12.
   • 9/12 + 2/12 = 11/12.

3. Thema: Percentages

   3. Express 45% as a fraction in its lowest terms.

   A45/100B9/20C4/5D9/10
   Lösung

   B. 9/20

   • 45% = 45/100.
   • Divide top and bottom by 5: 9/20.

4. Thema: Proportion

   4. If 5 pens cost GH₵ 15, how much do 8 pens cost?

   AGH₵ 18BGH₵ 20CGH₵ 24DGH₵ 40
   Lösung

   C. GH₵ 24

   • Cost of one pen: 15 ÷ 5 = GH₵ 3.
   • Cost of 8 pens: 8 × 3 = GH₵ 24.

5. Thema: Mensuration

   5. Find the area of a rectangle 12 cm long and 7 cm wide.

   A19 cm²B38 cm²C84 cm²D96 cm²
   Lösung

   C. 84 cm²

   • Area of a rectangle = length × width.
   • 12 × 7 = 84 cm².

6. Thema: Equations

   6. Solve 2x + 5 = 17.

   Ax = 6Bx = 11Cx = 8.5Dx = 12
   Lösung

   A. x = 6

   • Subtract 5 from both sides: 2x = 12.
   • Divide by 2: x = 6.

7. Thema: Approximation

   7. Round 3.6478 to two decimal places.

   A3.64B3.65C3.6D3.648
   Lösung

   B. 3.65

   • Look at the third decimal place: 7.
   • 7 is 5 or more, so round the second decimal place up: 3.65.

8. Thema: Sets

   8. If A = {2, 4, 6, 8}, find n(A).

   A2B4C8D20
   Lösung

   B. 4

   • n(A) is the number of elements in set A.
   • A has 4 elements.

9. Thema: Mensuration

   9. Find the perimeter of a square of side 9 cm.

   A18 cmB36 cmC81 cmD27 cm
   Lösung

   B. 36 cm

   • A square has 4 equal sides.
   • Perimeter = 4 × 9 = 36 cm.

10. Thema: Number bases

    10. Convert 101 (base two) to base ten.

    A3B5C101D7
    Lösung

    B. 5

    • Place values from the right: 1, 2, 4.
    • 101₂ = 1 × 4 + 0 × 2 + 1 × 1 = 5.