Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q1. 

1)  100.8 sq cm  2)  112.4 sq cm 
3)  104.2 sq cm  4)  Cannot be determined 
5)  None of these 
Answer : 100.8 sq cm
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Q2.  The ratio of the adjacent angles of a parallelogram is 7 : 8. Also, the ratio of the angles of quadrilateral is 5 : 6 : 7 : 12. What is the sum of the smaller angle of the parallelogram and the second largest angle of the quadrilateral ? 
1)  136°  2)  156° 
3)  168°  4)  208° 
5)  None of these 
Answer : 168°
Explanation :
Explanation :
Sum of the adjacent angles of a parallelogram is 180°.
Smaller angle of the parallelogram = 7/15 × 180 = 84°
Second largest angle of the quadrilateral = 7/30 × 360 = 84°
Required sum = 84 + 84 = 168°
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Q3.  The ratio of the adjacent angles of a parallelogram is 7 : 8. Also, the ratio of the angles of quadrilateral is 5 : 6 : 7 : 12. What is the sum of the smaller angle of the parallelogram and the second largest angle of the quadrilateral ? 
1)  136°  2)  156° 
3)  168°  4)  208° 
5)  None of these 
Answer : 168°
Explanation :
Explanation :
Sum of the adjacent angles of a parallelogram is 180°.
Smaller angle of the parallelogram = 7/15 × 180 = 84°
Second largest angle of the quadrilateral = 7/30 × 360 = 84°
Required sum = 84 + 84 = 168°
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Q4.  The smallest side of a rightangled triangle is 8 cm less than the side of a square of perimeter 56 cm. The second largest side of the rightangled triangle is 4 cm less than the length of the rectangle of area 96 sq cm and breadth 8 cm. What is the largest side of the rightangled triangle ? 
1)  10 cm  2)  12 cm 
3)  15 cm  4)  18 cm 
5)  None of these 
Answer : 10 cm
Explanation :
Explanation :
Side of the square = 56/4 = 14 cm
smallest side of the triangle = 14 – 8 = 6 cm
Length of the rectangle = 96/ 8 = 12 cm
Second largest side of the triangle = 112 – 4 = 8 cm
So, Largest side of the triangle = square root of 6^{2} + 8^{2 } = 10 cm
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Q5. 

1)  1/3  2)  1/4 
3)  1/2  4)  No change 
5)  None of these 
Answer : 1/2
Explanation :
Explanation :
Let the length and breadth of the rectangle be L and B respectively.
Area = L x B = LB
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Q6. 

1)  25  2)  36 
3)  38  4)  30 
5)  None of these 
Answer : 36
Explanation :
Explanation :
The smallest angle = 3/15 x 180° = 36°
The largest angle =7/15 x 180° = 84°
So, (36 x 2)  (84/ 2) = 36
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Q7. 

1)  344.35 cm2  2)  462 cm2 
3)  498.35 cm2  4)  456cm2 
5)  None of these 
Answer : 498.35 cm2
Explanation :
Explanation :
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Q8. 

1)  18.8 cm  2)  23.5 cm 
3)  24 cm  4)  31.3cm 
5)  None of these 
Answer : 24 cm
Explanation :
Explanation :
The final ratio of the triangle are 20 : 15 : 12
Perimeter = 20x + 15x + 12x = 47 x
So, 47x = 94
or = x = 2
Thus smallest side = 122 = 24 cm.
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Q9. 

1)  16 cm  2)  18 cm 
3)  24 cm  4)  Data Inadequate 
5)  None of these 
Answer : 18 cm
Explanation :
Explanation :
2(l + b) /b = 5/1 or 2l + 2b = 5b
or 3b = 2l b =2l/3
Then, Area = 216 cm2
l x b = 216
l x2l/3 = 216 or l^{2 }= 324
or l = 18 cm.
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Q10. 

1)  15 mtrs  2)  26 mtrs 
3)  25 mtrs  4)  20 mtrs 
5)  None of these 
Answer : 20 mtrs
Explanation :
Explanation :
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