Saturday 23 May 2015

SSC CGL 2015:- Geometry



1. Ashok has drawn an angle of measure 27’ when he was asked to draw an angle of  the percentage error in his drawing is
1)  0.5                     
2) 1.0                    
3) 1.5                      
4) 2.0

2. The sides of a triangle are in the ratio 3: 4: 6. The triangle is:
1) acute-angle      
2) right angled        
3) Obtuse angled             
4) either acute-angled or right angled

3. Two medians AD and BE of  ABC intersect at G at right angles. If AD=9 cm and BE=6 cm, then the length of BD, in cm, is
1) 10                       
2) 6                          
3) 5                        
4) 3

4. The ortho centre of a right angled triangle lies
1) Outside the triangle          
2) at the right angular vertex        
3) on its hypotenuse             
 4) within the triangle

5. Two line segment PQ and RS intersect at X in such a way that XP=XR. If  PSX=  RQX, then one must have
1) PR=QS                             
2) PS=RQ      
3)  XSQ=   XRP              
4) ar ( PXR) = ar (  QXS)

6. AD is the median of a triangle ABC and O is the cancroids such that AO = 10 cm. the length of OD in cm is
1) 4                          
2) 5                          
3) 6                          
4)8

7. One chord of a circle is known to be 10.1 cm. the radius of this circle must be:
1) 5 cm                                                  
2) greater than 5 cm      
3) Greater than or equal to 5 cm      
4) less than 5cm

8. The length of the chord of a circle is 8 cm and perpendicular distance between centre and the chord is 3 cm. then the radius of the circle is equal to:
1) 4 cm               
2) 5 cm                      
3) 6 cm                   
4) 8 cm

9. Each interior angle of a regular polygon is three times its exterior angles, then the number of sides of the regular polygon is three times its exterior angles, then the number of sides of the regular polygon is :
1) 9                     
2) 8                              
3) 10                       
4) 7

10. In a regular polygon, the exterior and interior angles are in the ratio 1: 4 the number of sides of the polygon is
1) 10                   
2) 12                           
3) 15                       
4) 16

11. If the lengths of the three sides of a triangle are 6 cm, 8 cm and 10 cm, then the length of the median to its greatest side is
1) 8 cm               
2) 6 cm                      
3) 5 cm              
4) 4.8 cm

12. The difference between the exterior and interior angles at a vertex of a regular polygon is . The number of sides of the polygon is:
1) 10                       
2) 15                       
3) 24                       
4) 30

13. In   ABC, O is the centroid and AD , BE, CF are three medians and the area of  AOE= 15 , then area of quadrilateral BDOF is
1) 20             
2) 30          
3) 40          
4) 25
  
 14. In  ABC, AD is the internal bisector of  A, meeting the side BC at D. if BD=5 cm, BC=7.5 cm, then AB : AC is
1) 2 : 1                     
2) 1: 2                    
3)  4: 5            
4) 3 : 5

15. Each interior angle of a regular polygon is . The number of sides of the polygon is
1) 8                          
2) 9                           
3) 10                
4) 11

16. ABCD is a square. M is the midpoint of AB and N is the midpoint of BC. DM and AN are joined and they meet at O. then which of the following is correct?
1) OA : OM = 1: 2                 
2) AN : MD      
3) ADM =  ANB                
4)  AMD= BAN

17. AB= 8 cm and CD =6 cm are two parallel chords on the same side of the centre of a circle. The distance between them is 1 cm. the radius of the circle is
1) 5 cm                 
2) 4 cm                  
3) 3 cm             
4) 2 cm
  
18. The side AB of a parallelogram ABCD is produces to E in such way that BE = AB. DE intersects BC at Q. the point sects BC at Q. the point Q divides BC in the ratio
1) 1: 2                     
2) 1 : 1                   
3) 2 : 3                    
4) 2 : 1

19. If a chord of a circle of radius 5 cm is a tangent to a circle of radius 3 cm, both the circles being concentric, then the length of the chord is
1) 10 cm                
2) 12. 5 cm            
3) 8 cm                  
4) 7 cm

20. The length of two chords AB and AC of a circle are 8 cm and 6 cm and  BAC= , then the radius of circle is
1) 25 cm              
2) 20 cm                   
3) 4 cm              
4) 5 cm

21. The points D and E are taken on the sides AB and AC of ABC such that AD =  AB, AE=  AC. If the length of BC is 15 cm, then the length of DE is:
1) 10 cm                
2) 8 cm                
3) 6 cm              
4) 5 cm

22. If the sum of the interior angles of a regular polygon be , the number of sides of the polygon is
1) 6                            
2) 8                         
3) 10                      
4) 12

23. The perimeter of the triangular base of a right prism is 15 cm triangular base is 3 cm. if the volume of the prism be 270 , then the height of the prism is
1) 6 cm                
2) 7.5 cm                 
3) 10 cm            
4) 12 cm

24. ABCD is a rhombus. A straight line through C cuts AD produced at P and AB produced at Q. if DP =  AB, then the ratio of the lengths of BQ and AB is
1) 2 : 1                    
2) 1: 2                    
3) 1: 1                    
4) 3: 1

25. The distance between two parallel chords of length 8 cm each in a circle of diameter 10 cm is
1)  6 cm               
2) 7 cm                    
3) 8 cm         
4) 5.5 cm

26. If the circumradius of an equilateral triangle be 10 cm, then the measure of it’s in- radius is the measure of its in-radius is
1) 5 cm                 
2) 10 cm                 
3) 20 cm         
4) 15 cm

27. The number of sides in two regular polygons are in the ratio 5 : 4 and the difference between each interior angle of the polygons is . Then the numbers of sides are
1) 15, 12               
2) 5, 4                     
3) 10, 8         
4) 20, 16

28. In a quadrilateral ABCD, with unequal sides if the diagonals AC and BD intersect at right angles, then
1)   +  =   +         
2)    +  =   +        
3)    +  =   +      
4)   +  =   +

  
29. D is any point on side AC of  ABC. If P,Q, X, Y are the midpoints of AB, BC, AD and DC respectively, then the ratio of PX and QY is
1) 1 : 2               
2) 1 : 1                      
3) 2: 1                     
4) 2: 3

30. A straight line parallel to BC of  ABC intersecs AB and AC at point P and Q respectively. AP = QC, PB=4 units and AQ=9 units, then the length of AP is:
1) 25 units           
2) 3 units           
3) 6 units       
4) 6.5 units


31. Each internal angles of regular polygon is two times its external angles. Then the number of sides of the polygon is :
1) 8                          
2) 6                   
3) 5                                 
4) 7

32. Ratio of the number of sides of two regular polygons is 5: 6 and the ratio of their each interior angles is
24 : 25. Then the numbers of sides of these two polygons are
1) 20, 24               
2) 15, 18                   
3) 10, 12                
4) 5,6

Answer 

1.            (2)
2.            (3)
3.            (3)
4.            (2)
5.            (2)
6.            (2)
7.            (2)
8.            (2)
9.            (2)
10.          (1)
11.          (3)
12.          (3)
13.          (2)
14.          (1)
15.          (3)
16.          (3)
17.          (1)
18.          (2)
19.          (3)
20.          (4)
21.          (4)
22.          (2)
23.          (4)
24.          (1)
25.          (1)
26.          (1)
27.          (1)
28.          (2)
29.          (2)
30.          (3)
31.          (2)
32.          (3)
 

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