GCSE Mathematics (9-1)
  1. Write x<4x<4 in words. Is 4 included?
  2. Write x≥−2x\geq -2 in words. Is −2-2 included?
  3. Write “xx is greater than 3” as an inequality.
  4. Write “xx is at most 7” as an inequality.
  5. Write the solution set −1≤x<5-1\leq x<5 in set-builder notation.
  6. On a number line, describe x>−3x>-3.
  7. List the integer values satisfying −2<x≤2-2<x\leq2.
  8. 'Which includes its boundary: x<6x<6 or x≤6x\leq6?'
  9. Write “at least 2 and less than 8” using inequality symbols.
Answers and concise solutions

1. Write x<4x<4 in words. Is 4 included?

Answer: All values below 44; 44 is not included.

2. Write x≥−2x\geq -2 in words. Is −2-2 included?

Answer: All values at least −2-2; −2-2 is included.

3. Write “xx is greater than 3” as an inequality.

Answer: x>3x>3.

4. Write “xx is at most 7” as an inequality.

Answer: x≤7x\leq7.

5. Set-builder notation

Answer: '{x∈R:−1≤x<5}\{x\in\mathbb{R}: -1\leq x<5\}.'

6. On a number line, describe x>−3x>-3.

Answer: Open circle at −3-3; shade to the right.

7. List the integer values satisfying −2<x≤2-2<x\leq2.

Answer: −1,0,1,2-1,0,1,2.

8. 'Which includes its boundary: x<6x<6 or x≤6x\leq6?'

Answer: x≤6x\leq6 includes 66.

9. Write “at least 2 and less than 8” using inequality symbols.

Answer: 2≤x<82\leq x<8.

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