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Math Code Breakers Worksheet

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Math Code Breakers Worksheet

Solve each maths question. Use the answer key printed in each section to reveal a code word. Show working where space is provided.

Code 1: Choose the correct answer

Choose one option for each question. Copy the matching code letter into the five boxes in question order.

1.At a car wash fundraiser, Charlotte washes 7 cars in the morning and 8 in the afternoon. How many cars did she wash altogether?
  • 14 (K)
  • 15 (M)
  • 16 (R)
2.Manaia collects $4 from each of 6 customers. How much does he collect?
  • $24 (A)
  • $20 (L)
  • $28 (S)
3.Which fraction is equal to 0.6?
  • 3/5 (T)
  • 2/3 (E)
  • 1/4 (O)
4.A bucket holds 1.8 L of water. Which amount is equivalent?
  • 180 mL (P)
  • 1,800 mL (H)
  • 18,000 mL (N)
5.The temperature is 4°C, then drops by 7°C. What is the new temperature?
-5-4-3-2-1012345
  • −3°C (S)
  • 3°C (B)
  • 11°C (C)
6.Write the five code letters from the questions above, in order, to reveal a word.

Code 2: Short answers and matching

Show your calculations where appropriate.

7.Ana buys 4 cloths for $1.25 each and a drink for $2.60 at the car wash. How much change does she receive from $10?
8.The morning temperature was 3°C. By lunchtime it had risen by 9°C. What was the lunchtime temperature?
9.A 3.15 m hose is divided into 5 equal lengths. How long is each length in centimetres? Show your working.
10.Match each quantity on the left to its equivalent on the right. You may use a right-hand option more than once.
  • A. 0.4
  • B. 2/5
  • C. 25%
  • D. 2.5 m
  • 2) 0.4
  • 4) 1/4
  • 3) 40%
  • 1) 250 cm

Code 3: Number puzzle

Solve each problem. Convert your answers using this code: 9 = C, 14 = O, 16 = D, 5 = E, 11 = S. Write the resulting letters in question order.

11.Work out 18 × 5 ÷ 10.
12.Work out 54 ÷ 6 + 5.
13.Evaluate 2⁴.
14.Find 25% of 20.
15.Calculate 36 − 25.
16.Write the five letters produced by the number code above, in order.

Code 4: Final challenge

Solve each problem, then use the number-to-letter code to uncover the final word: 5 = B, 24 = R, 7 = A, 180 = V, 12 = E.

17.A rectangle has a perimeter of 34 cm and a length of 12 cm. What is its width?
18.Find 3/8 of 64.
19.Solve 4x + 9 = 37.
20.Calculate the area of a triangle with a base of 30 cm and a perpendicular height of 12 cm.
21.Convert 0.2 hours into minutes.
0102030405060
22.Write the five letters from the final number code in order. What word do they spell?

4 printable pages

  • Year 7 maths code breaker worksheet with multiple-choice arithmetic, decimals, fractions, measurement and negative temperatures.

    Page 1

  • Short-answer money and measurement problems plus a matching activity on equivalent fractions, decimals, percentages and units.

    Page 2

  • Order of operations, powers and percentage calculations reveal a number-code word.

    Page 3

  • Final code challenge practising perimeter, fractions, algebra, triangle area and time conversion.

    Page 4

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