RULEMATH | MATH ONLINE/DIRECT CLASS | MATH WEBSITE | SCIENCE CLASS 10, PHYSICS CLASS 11 AND 12

  CLASS 9 POLYNOMIALS  ASSIGNMENT  Factorise the following: 1. 2x 2  + 7x + 6 2. a 2  + 7a +10  3. x 2  – x – 6 4. t 2  – 5t – 14 5. 3y 2  + 2y – 8  6 . Find whether x-1 is a factor of  x 4  + 3x 3  – x – 3. 7. Find whether x+1 is a factor of x 3  + x 2  – 5x + 3 8. Find the values of the polynomial 3x 4  + 6x 3  – 12x 2  – 24x at x=-2, 3.  9. Evaluate 4x 4  + 14x 3  + 8x 2  – 8x at x = 1/4, -1/2. 10. Factorise y 3  + 2y 2  – 4y – 8 11. Factorise  2t 3  + 7t 2  + 4t – 4   12. Factorise m 3 – 3m 2 – 9m – 5

  SAMACHEER KALVI CLASS 10 STATISTICS AND PROBABILITY IMPORTANT CONCEPT BASED QUESTIONS TOTAL NUMBER OF QUESTIONS: 30 1.    Find the range and coefficient of range of the following data. (i) 63, 89, 98, 125, 79, 108, 117, 68 2.  Find the variance and standard deviation of the wages of 9 workers given below: ₹ 310, ₹ 290, ₹ 320, ₹ 280, ₹ 300, ₹ 290, ₹ 320, ₹ 310, ₹ 280. 3.  If the range and the smallest value of a set of data are 36.8 and 13.4 respectively, then find the largest value. 4.  Find the standard deviation of the first 21 natural numbers. 5.  If the standard deviation of a data is 3.6 and each value of the data is divided by 3, then find the new variance and new standard deviation. 6.  The rainfall recorded in various places of five districts in a week are given below. Find its standard deviation. 7.  The measurements of the diameters (in cms) of the plates prepared in a factory are given below. Find the standard deviation. 8. ...