7 protractors cost £16.87. What does 1 protractor cost?

5 calculators cost £76.35. What do 3 calculators cost?

5 pencils cost £8.75. What does 1 pencil cost?

5 rubbers cost £5.15. What do 10 rubbers cost?

7 pens cost £22.26. What does 1 pen cost?

5 sharpeners cost £9.60. What do 6 sharpeners cost?

9 calculators cost £78.12. What does 1 calculator cost?

8 compasses cost £31.44. What does 1 compass cost?

10 rubbers cost £14.90. What does 1 rubber cost?

11 compasses cost £52.25. What do 4 compasses cost?

6 calculators cost £179.82. What do 10 calculators cost?

9 pencils cost £2.34. What do 6 pencils cost?

12 pens cost £25.32. What do 3 pens cost?

11 rulers cost £23.21. What does 1 ruler cost?

11 pencils cost £12.32. What do 6 pencils cost?

8 sharpeners cost £18.40. What does 1 sharpener cost?

4 sharpeners cost £11.60. What do 7 sharpeners cost?

6 rubbers cost £8.76. What does 1 rubber cost?

8 compasses cost £24.00. What do 11 compasses cost?

11 rulers cost £19.80. What does 1 ruler cost?

7 rulers cost £6.93. What do 9 rulers cost?

12 rulers cost £19.92. What does 1 ruler cost?

5 sharpeners cost £12.75. What do 8 sharpeners cost?

11 rubbers cost £6.27. What does 1 rubber cost?

4 sharpeners cost £10.64. What do 6 sharpeners cost?