) In a library, the ratio of number of story books to that of non-story books was 4:3 and total number of story books was 1248. When some more story books were bought, the ratio became 5:3. Find the number of story books bought.
A. 312
B. 321
C. 936
D. 1560
E. None of these
Explanation
ANSWER : (A) 312
Explanation:
) Rs. 8400 is divided among A, B, C and D in such a way that the shares of A and B, B and C, and C and D are in the ratios of 2:3, 4:5 and 6:7 respectively. The share of A is
A. Rs. 1280
B. Rs. 8400
C. Rs. 8210
D. Rs. 1320
E. None of these
Explanation
ANSWER: (A) Rs. 1280
) . The difference between two numbers is 1550. If 8 % of one number is 10 % of the other number, then find the two numbers
A. 4973, 6523
B. 5450, 7000
C. 6200, 7750
D. 6500, 4950
E. None of these
Explanation
Correct Option: (c)
Let two numbers be x and y.
It is given that, 8 % of x = 10 % of y
Therefore,
x = 10/8 y = 5/4 y
Difference between two numbers (x – y)= 1550
Substituting the value of x, we get
5/4 – y = 1550
y/4 = 1550
y=1550×4=6200
x = 5/4 × 6200 = 7750
The two numbers whose difference is 1550 are 6200 and 7750.
) Two numbers P and Q are such that, the sum of 2 % of P and Sum of 2 % of Q is two-third of the sum of 2 % of P and 6 % of Q. Find the ratio of P and Q.
A. 2 : 5
B. 3 : 1
C. 1 : 4
D. 5 : 1
E. None of these
Explanation
Correct Option: (B)
) . 50 % of a number is 18 less than two-third of that number. Find the number.
A. 123
B. 119
C. 115
D. 108
Explanation
Correct Option: (D)
) Suresh borrows Rs. 10,000 for 2 years at 4 % p.a. simple interest. He lends it to Ramesh at 6 % p.a. for 2 years. Find his gain in this transaction per year.
A. Rs. 150
B. Rs. 200
C. Rs. 400
D. Rs. 450
E. None of these
Explanation
Correct Option: (B)
) At what rate percent per annum will sum of money double in 20 years?
A. 1.2 %
B. 2 %
C. 4 %
D. 5 %
E. None of these
Explanation
Correct Option: (D)
) The population of a city increases 5 % annually but decreases by ¼ % due to emigration. Find the net increase in percent in 3 years.
A. 8.63 %
B. 11.89 %
C. 13.25 %
D. 14.93 %
E. None of these
Explanation
Correct Option: (D)
) A shopkeeper sells an article for Rs. 200 with a loss of Rs. 20 %. Find the cost price of the article.
A. 220
B. 250
C. 280
D. 260
E. None of these
Explanation
Correct Option: (B)
) . A trader expects a gain of 15 % on his cost price. If in a week his sale is of Rs. 580, then what is his profit?
A. 75.65
B. 73.26
C. 72.50
D. 70.78
E. None of these
Explanation
Correct Option: (A)
) If a boy sells a book for Rs. 450 he gets a loss of 10 %, then find cost price. To gain 10 %, what should be the selling price?
A. 400, 500
B. 550, 600
C. 500, 550
D. 475, 525
E. None of these
Explanation
Correct Option: (c)
) . A merchant sells 30 metres of cloth and gains selling price of 10 metres. Find the gain percent.
A. 15 %
B. 25 %
C. 50 %
D. 75%
E. None of these
Explanation
Correct Option: (c)
