Maths - you may use a calculator

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Across
  1. 3. The sum of the year Sam and Matthew were born
  2. 4. The amount of secounds in a leap year
  3. 7. The new flat code
  4. 8. The product of the house numbers of our house, your house and the flat
  5. 10. The next leap year
Down
  1. 1. the combined product of the McKeowns ages on the 9th September
  2. 2. Grandmas age times by 500
  3. 4. The product of the year Emily and Anna were born
  4. 5. The current year times Emily's age
  5. 6. The amount Sue's cousins times by the amount of Sibling John had
  6. 9. The number of Dalmatians minus a bakers dozen