Mathmetics

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

Q421.
Directions: Study the following chart and table carefully to answer the questions that follow :
Percentage breakup of employees working in various departments of an organization and the ratio of men to women in them.
Percentage Breakup of Employees Total Number of employees = 1800


What is the respective ratio of the number of men working in the Accounts department to the total  number of employees working in that department ?
1) 9:2 2) 7:6
3) 2:9 4) 6:7
5)None of these
Answer : 2:9
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Q422.
Directions: Study the following chart and table carefully to answer the questions that follow :
Percentage breakup of employees working in various departments of an organization and the ratio of men to women in them.
Percentage Breakup of Employees Total Number of employees = 1800


The number of men working in the Production department of the organization forms what percent of the total number of employees working in that department ? (rounded off to two digit after decimal)
1) 89.76 2) 91.67
3) 88.56 4) 94.29
5)None of these
Answer : 91.67
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Q423.
Directions: Study the following chart and table carefully to answer the questions that follow :
Percentage breakup of employees working in various departments of an organization and the ratio of men to women in them.
Percentage Breakup of Employees Total Number of employees = 1800


What is the number of men working in the Marketing department ?

1) 132 2) 174
3) 126 4) 189
5)None of these
Answer : 189
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Q424.
The circumference of the front wheel of a cart is 30 ft long and that of the back wheel is 36 ft long. What is the distance travelled by the cart, when the front wheel has done five more revolutions than the rear wheel ?
1) 450 ft 2) 825 ft
3) 750 ft 4) 900 ft
5)None of these
Answer : 900 ft
Explanation :
The circumference of the front wheel is 30 ft and that of the rear wheel is 36 feet.
Let, the rear wheel make n revolutions. At this time, the front wheel should have made n+5 revolutions.
As both the wheels would have covered the same distance, 
        n x 36 = (n+5) x 30
or 36n = 30n + 150
or 6n = 150
or n = 25.
So, distance covered = 25 x 36 = 900 ft
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Q425.
The monthly income of Mohan and suresh are in the ratio of 6:5 and their monthly expenditures are in the ratio of 11:8. If each of them saves Rs. 5,200 per month, then what is the diffrence in the monthly incomes of Mohan and Suresh ?
1) Rs.750 2) Rs.2,250
3) Rs.6,000 4) Rs.8,250
5)Rs. 11,250
Answer : Rs.2,250
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Q426.
In a certain store, the profit is 250% of the cost. If the cost increases by 20% but the selling price remains constant, approximately what percentage of the selling price is the profit ?
1) 55% 2) 60%
3) 66.66% 4) 75%
5)None of these
Answer : 66.66%
Explanation :
Let C.P.= Rs. 100. Then, Profit = Rs. 260, S.P. = Rs. 360.
New C.P. = 120 % of Rs. 100 = Rs. 120
New S.P. = Rs. 360.
Profit = Rs. (360 - 120) = Rs.240.
Required percentage = (240/360) x 100 = 66.66%
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Q427.
The compound interest on a certain sum for 2 years at 10% per annum is Rs. 525. The simple interest on the same sum for double the time at half the rate percent per annum is:
1) Rs. 400 2) Rs. 500
3) Rs. 600 4) Rs. 800
5)None of these
Answer : Rs. 500
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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Q428.
A sum of Rs. 12,500 amounts to Rs. 15,500 in 4 years at the rate of simple interest. What is the rate of interest ?
1) 3% 2) 4%
3) 5% 4) 6%
5)None of these
Answer : 6%
Explanation :
S.I. = Rs. (15500 - 12500) = Rs. 3000.
Rate = [ (100 x 3000) x (12500 x 4 ) ] = 6%
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Q429.
Amit took loan from a bank at the rate of 12% p.a as simple interest. After 3 years he had to pay Rs. 5400 interest only for the period . The principal amount borrowed by him was:

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.
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Q430.
A sum of money amounts to Rs. 9800 after 5 years and Rs. 12005 after 8 years at the same rate of simple interest. The rate of interest per annum is:
1) 5% 2) 8%
3) 12% 4) 5%
5)None of these
Answer : 12%
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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