KENDRIYA VIDYALAYA SANGATHAN - NCERT Help

www.ncerthelp.comKENDRIYA VIDYALAYA SANGATHANHYDERABAD REGIONCOMMON FORMATIVE ASSESSMENT – IClass: VIIIMarks: 40Sub: MATHEMATICSDuration: 90 MinutesInstructions:All questions are compulsory. Section A contains 5 questions of 1 mark each, Section Bcontains 4 questions of 2 marks each, Section C contains 5 questions of 3 marks each andSection D contains 3 questions of 4 marks each.SECTION – A1. The additive inverse of the (a)19(b)777197(c) 19is19(d) 02. The product of 6/13 and the reciprocal of (a) 96(b)913. The solution of96(c)9137 𝑥 1779196(d) 71642()()()is16is(a) x 14(b) x 2(c) x 10 (d) x 44. RICE is a Rhombus. The value of x in the figure isE12 cmxR5C12 cmI(a) 5(b) 12(c) 13(d) 105. The name of the regular polygon of four sides is()(a) Triangle (b) Square(c) Rectangle(d) parallelogramISECTION – B6. Find 3 rational numbers between ¼ and ½7. Solve8 𝑥 33𝑥 2Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More.

www.ncerthelp.com8. Find the angle measure x in the following figure.70ox60o9. Some of two numbers is 95. If one exceeds the other by 15, find the number.SECTION-C10. Represent -2/11 ,-5/11 on the number line.11. The sum of three consecutive multiples of 8 is 888. Find the multiples.12. The ages of Hari and Harry are in the ratio 5:7. Four years from now the ratio oftheir ages will be 3:4 .Find their present ages.13. Find 45315716𝑋 𝑋𝑋 14G9N14. In a Parallelogram RING, if m LR 70 ,find all the other angles.700SECTION-DR15. Using appropriate properties , find2𝑋5 37 1631214𝑋 𝑋I2516. Arjun is twice as old as Shriya. Five years ago his age was three times Shriya’ s age.Find their present ages.17. The adjacent figure HOPE is a Parallelogram. Find the angle measures x, y, and z Statethe properties used to find them. EPxy400z(OR)700HOIdentify all the quadrilaterals that have (a) 4 sides of equal length (b) 4 Right angles andshow them with figures.Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More.

www.ncerthelp.comKENDRIYA VIDYALAYA SANGATHANHYDERABAD REGIONSCORING KEY FOR COMMON FORMATIVE ASSESSMENT – I – 2014-2015Class: VIIIMarks: 40Sub: MATHEMATICSDuration: 90 MinutesSECTION – A1. b2. a3. b4. a5. bSECTION – B6. For making denominator sameFor writing 3 rational nos.7. 8x – 3 6 x cross multiplicationFor correct steps & for correct answero8. For some of four angles in a quadrilateral is 360For correct steps and for finding value of x9. Forming two numbers --- x, x 15Finding the numbers½ mark1 ½ mark½ mark1 ½ mark½ mark1 ½ mark1 mark1 markSECTION – C10. For drawing number lineFor correct representation1 mark2 marks11. If x is a multiple of 8, the next multiples are x 8 and x 16 1 markX (x 8) (x 16) 888For solving xX 288, x 8 296, x 16 304½ mark1 ½ marks12. Let the ages of Hari & Harry are 5x, 7x1 markAccording to the problem, (5x 4) (7x 4) ¾ 1 markFor solving and correct answer1 markVisit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More.

www.ncerthelp.com13. For simplification & correct answer each 1 markAnswer is ½o14. LR LN 70 (Opposite angles of a parallelogram)LR and LI are (supplementary angles)LI 180o – 70o 110o1 mark1 mark1 markSECTION – D15. For each correct simplification and correct property1 mark each16. Let the age of Shriya is x years.½ markAge of Arjun 2 x years1 markATP. 2x - 5 3 (x-5)1 markFor finding x and correct answer1 ½ marksoo17. 40 z 70 (corresponding angles of parallel lines HE & OP) 1 ½ markZ 30oY 40o (Alternate interior oppoisite angles of parallel lines HO & EP) 1 markLinear pair 180o – 70o 110o½ markTherefore x 110o (Opp. Angles of parallelogram are equal) 1 mark(OR)Ans: Square and Rhombus including figuresSquare and Rectangle including figures2 marks2 marksVisit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More.

www.ncerthelp.com18.Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More.

8. Find the angle measure x in the following figure. 9. Some of two numbers is 95. If one exceeds the other by 15, find the number. SECTION-C 10. Represent -2/11 ,-5/11 on the number line. 11. The sum of three consecutive multiples of 8 is 888. Find the multiples. 12. The ages of Hari and Har