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Find the value of s which makes 8s + 2 a prime number.
Write down an irrational number between 7 and 8.
Light travels at a speed of 3 × 10⁸ m/s. Calculate the time it takes for light to travel 6km. Give your answer in sta…
Expand and simplify 4(2t + 3) + 5.
Expand and simplify 6p + 3q - 2(2p – 5q).
Factorise completely 25x³y² - 15x²y.