Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q11.  If Rs.85 amounts to Rs.95 in 3 years, what Rs102 will amounts to in 5 years at the same rate percent ? 
1)  Rs112  2)  Rs.118 
3)  Rs.122  4)  Rs.132 
5)  None of these 
Answer : Rs.122
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Q12.  A sum of money lent at simple interest amounts to Rs.720 after 2 years and to Rs. 1020 after a further period of 5 years. Find the rate of interest. 
1)  6%  2)  8% 
3)  10%  4)  12% 
5)  None of these 
Answer : 10%
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Q13.  Alok borrowed Rs.2500 from two money lenders. For one loan, he paid 5% and for the other, he paid 7% per annum.The total interest paid for two years was Rs.265. How much did he borrow at 7% rate ? 
1)  Rs.625  2)  Rs.825 
3)  Rs.1875  4)  Rs.1675 
5)  None of these 
Answer : Rs.625
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Q14.  A man lent Rs.600 for 2 years and Rs.200 for 3 years at the same rate at simple interest and received only Rs.90 as interest. What was the rate of interest ? 
1)  4%  2)  5% 
3)  6%  4)  7.5% 
5)  None of these 
Answer : 5%
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Q15.  The simple interest on a certain sum of money at 4 % per annum for 4 years is Rs.80 more than interest on the same sum for 3 years at 5% per annum. Find the sum of money. 
1)  Rs.6700  2)  Rs.7500 
3)  Rs.8000  4)  Rs.8500 
5)  None of these 
Answer : Rs.8000
Explanation : Let, Principal be P.
Explanation : Let, Principal be P.
So, (Px4x4)/100  (Px3x5)/100 = 80
or P/100 = 80
or P = 80 x 100 = 8000/
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Q16. 

1)  Rs. 400  2)  Rs. 500 
3)  Rs. 600  4)  Rs. 800 
5)  None of these 
Answer : Rs. 500
Explanation : P = Rs. 100
Explanation : P = Rs. 100
Given, R= 10% Time = 2 yrs
So, C.I = Rs. 21 So,21 % = 525
100% = (525/21) /100 = 2500
Then, P = (2500 x 5 x 4 ) /100 = Rs. 500
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Q17. 

1)  3%  2)  4% 
3)  5%  4)  6% 
5)  None of these 
Answer : 6%
Explanation :
Explanation :
S.I. = Rs. (15500  12500) = Rs. 3000.
Rate = [ (100 x 3000) x (12500 x 4 ) ] = 6%
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Q18. 

1)  Rs. 2000  2)  Rs. 10,000 
3)  Rs. 15,000  4)  Rs. 20,000 
5)  None of these 
Answer : Rs. 15,000
Explanation : Principal = (100 x 54 /12 x 3 ) = Rs. 15000.
Explanation : Principal = (100 x 54 /12 x 3 ) = Rs. 15000.
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Q19. 

1)  5%  2)  8% 
3)  12%  4)  5% 
5)  None of these 
Answer : 12%
Explanation :
Explanation :
S.I. for 3 years = Rs. (12005  9800) = Rs. 2205.
S.I. for 5 years = [(2205/3 ) x 5 ]= Rs. 3675
Principal = Rs. (9800  3675) = Rs. 6125.
Hence, rate = [100 x 3675 /(6125 x 5 ) ] x 5 % = 12%
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Q20. 

1)  Rs. 35  2)  Rs. 245 
3)  Rs. 350  4)  Cannot be determined 
5)  None of thes 
Answer : Cannot be determined
Explanation :
Explanation :
We need to know the S.I., principal and time to find the rate.
Since the principal is not given, so data is inadequate.
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