Math PT #1

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Across
  1. 4. The number of odd prime numbers before 50 multiplied by 4?
  2. 5. Simplify 5x(3y - 8)+3x(5x+10)
  3. 7. Joel is on the peak of a 50m hill, he goes down 20m and climbs back up 5m, what height is he at now?
  4. 9. Change 23 8/9 to a decimals. Express your answer correct to 4 significant figure.
  5. 11. What is the HCF of the HCF of 150 and 30 and the LCM of 120 and 15?
  6. 12. Change 11 4/7 to a decimals. Express your answer correct to 4 significant figure.
  7. 14. Evaluate (7-9)^6-24.
  8. 15. Evaluate 7^4-8^3.
  9. 16. If x=2 and y=9, find x(5y+8-3)+2y(x^2+5).
  10. 18. What is the smallest angle of a quadrilateral if the angles of a quadrilateral are x, 55°, 65° and 5x?
  11. 19. What is the sum of all the exterior angles of a polygon with 53 sides add by the sum of all the interior angles of a hexagon?
Down
  1. 1. Simplify 4(3(5x + 7))+2(x+9)
  2. 2. Simplify 17 * (28 / 2(4 -2)).
  3. 3. What is the square root of 1600 multiplied by the cube root of 5832?
  4. 4. Write in mathematical symbols the difference of 5 multiplied by x and 10.
  5. 6. x+y is a co-interior angle, if x is 60°, what is y?
  6. 8. Express the result of 5x6+5 as a product of prime numbers.
  7. 10. What is the LCM of the LCM of 120 and 124 and the HCF of 216 and 270?
  8. 13. What is the sum of the interior angles of a polygon with 30 sides divided by a right angles.
  9. 17. If the angles on a line are 2x, 4x and 60°, and x°, find x.
  10. 18. If the angles in a quadrilateral are 45°, 70°, 201°, and x, find x.