crossnumber

1234567
Across
  1. 2. 2/(x−1) + 3/(x+4) = (ax+b)/(x²+cx−d). Find abcd.
  2. 4. A right angled triangle has shorter sides of 5,12,x. Find \(x\).
  3. 5. Simplify: 250/(√51−7) − 250/(√51+7)
  4. 7. Class A: 25 pupils, mean score 62. Class B: 15 pupils, mean score 78. Find the sum of all 40 scores.
Down
  1. 1. Right-angled triangle, hypotenuse 1105, side 1073. Perimeter
  2. 3. Solve: 5/(x−1000) = 15/(x−12)
  3. 6. 84/(5−√11) = a + b√c. Find abc.