Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q1.  In a triangle ABC, the sides AB and AC have been produced to D and E. Bisectors of angle CBD and angle BCE meet at O. If angle A = 64°, then angle BOC is  
1)  54°  2)  56° 
3)  58°  4)  60° 
5)  None of these 
Answer : 58°
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Q2. 

1)  2  2)  3 
3)  4  4)  5 
5)  None of these 
Answer : 5
Explanation :
Explanation :
Since, DE parallel to BC
so, (AD / DB) = (AE / EC)
or {x / (x – 2)} = {(x + 2) / (x – 1)}
or x(x – 1) = (x + 2) (x – 1)
or x^{2} – x = x^{2 }– 4
or x = 4 .
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