SUM-THING SPECIAL

5. The constant value in a proportion a:b = c:d is sometimes referred to as the ___.
7. To rewrite x² – 9 as (x – 3)(x + 3), you must ___.
9. A root that cannot be simplified into a rational number.
13. The product of a surd and its conjugate always gives a ___ number.
16. The “k” in y = kx for direct proportion is called the ___.
20. The inequality sign reverses when multiplying or dividing both sides by a ___ number.
21. The total interest calculated on both the principal and accumulated interest is known as ___.
24. The rule that states a² + b² = c² in right-angled triangles is called ___.
25. The range of true values a rounded measurement can lie within is called the ___ interval.

1. The distance around a circle.
2. In 2³ = 8, the 3 is called the ___.
3. The amount of space a solid occupies.
4. Rounding numbers before calculation is called ___.
6. The x-___ is the horizontal line in a coordinate plane.
8. In 3.2 × 10⁴, the 3.2 is known as the ___.
10. If 4 pencils cost ₹20, then the cost of 10 pencils can be found using the method of ___ proportion.
11. The process that gives upper and lower bounds to a value.
12. The largest number that divides exactly into two or more given numbers is the ___.
14. Another name for "power" in mathematics.
15. The most frequently occurring value in a data set.\
17. The middle value of an ordered data set.
18. The lowest possible value a rounded number could have been.
19. Estimating √45 as 7 is an approximation to the nearest whole ___.
22. A whole number greater than 1 that has no positive divisors other than 1 and itself.
23. x + 3 < 7 is an example of an ___.