Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q1.  The rate of SI in bank A and bank B are in the ratio is 6:7. A businessman wants to deposits his total savings in these two banks in such a way that he received equal quarterly interest from both the banks.What should be his ratio of saving in bank A to bank B ? 
1)  3:4  2)  4:5 
3)  6:7  4)  7:6 
5)  None of these 
Answer : 7:6
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Q2.  The simple interest per annum on an amount of Rs.17,000 at the end of four years is Rs.6800. What would be the compound interest on the same amount at the same rate after 2 years ? 
1)  Rs.3240  2)  Rs.3470 
3)  Rs.3570  4)  Can'not be determined 
5)  None of these 
Answer : Rs.3570
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Q3.  A some of money at compound interest amounts to thrice itself in three years. In how man years will it be nine times itself ? 
1)  4 years  2)  6 years 
3)  8 years  4)  12 years 
5)  None of these 
Answer : None of these
Explanation : Let, principal be x.It will be 3x after years.
Explanation : Let, principal be x.It will be 3x after years.
9x will takes another 3 years.
So,total time taken= 3+3 = 6 years.
Shortcut method:
x  3x in 3 years
9x i.e. (3x)^{2} = 3 X 2 = 6 years.
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Q4. 

1)  625  2)  630 
3)  640  4)  650 
5)  None of these 
Answer : 625
Explanation : Short Cut Method:
Explanation : Short Cut Method:
Difference X (100)^{2}/ R^{2 }
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Q5. 

1)  Rs. 800  2)  Rs. 850 
3)  Rs. 900  4)  Rs. 1000 
5)  None of these 
Answer : Rs. 900
Explanation :
Explanation :
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Q6. 

1)  Rs. 400  2)  Rs. 500 
3)  Rs. 600  4)  Rs. 800 
5)  None of these 
Answer : Rs. 500
Explanation :
Explanation :
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Q7. 

1)  5%  2)  6% 
3)  8%  4)  10% 
5)  None of these 
Answer : 5%
Explanation :
Explanation :
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Q8. 

1)  30  2)  45 
3)  50  4)  60 
5)  None of these 
Answer : 45
Explanation :
Explanation :
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Q9. 

1)  3%  2)  4% 
3)  5%  4)  6% 
5)  None of these 
Answer : 5%
Explanation :
Explanation :
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Q10. 

1)  625  2)  630 
3)  640  4)  650 
5)  None of these 
Answer : 625
Explanation :
Explanation :
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