Across
- 2. sequence - a sequence of numbers in which the difference between consecutive terms is constant with nth term a + (n-1)d
- 6. difference - the difference between consecutive terms in an arithmetic sequence
- 8. proportion - as one increases, the other increases at the same rate; the ratio between the two quantities is constant
- 11. (noun) the bottom number of a fraction
- 12. - a straight line connecting two points on a circle
- 13. set (null set) - the set with no members
- 14. - a collection of objects
- 15. proportion - as one increases the other decreases at the same rate; for example, as one quantity doubles, the other halves
- 16. - line from the centre of a circle to the circumference
Down
- 1. figure - the first non-zero digit in the number, counting from the left
- 3. - the longest side of a right-angled triangle
- 4. - the top number of a fraction
- 5. series - sum of an arithmetic sequence
- 7. triangle - a triangle with two sides of equal length and two equal angles
- 9. (plural) (singular index) (= powers) - a number that tells you how many times the given number is multiplied;
- 10. - a straight line that touches a circle at one point only
- 17. notation - used with recurring decimals that shows which numbers recur