Three persons A, B and C are standing in a queue. There are five persons between A and B and eight persons between B and C. If there be three persons ahead of C and 21 persons behind A, what could be the minimum number of persons in the queue?
Anonymous Quiz
8%
(a) 41
46%
(b) 40
33%
(c) 28
13%
(d) 27
👍5
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Topic: 3 ✓ Geometric Progression.
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Topic: 3 ✓ Geometric Progression.
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👍3
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Topic: 4 ✓ Harmonica Progression.
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Topic: 4 ✓ Harmonica Progression.
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👍7
The difference between 42% of a number and 28% of the same number is 210. What is 59% of that number?
Anonymous Quiz
9%
(a) 630
62%
(b) 885
24%
(c) 420
6%
(d) 900
👍8
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Topic: 7 ✓ Profit & Loss.
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Topic: 7 ✓ Profit & Loss.
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👍4🔥2
In a row of girls. Neha is eighth from the left and Heena is seventeenth from the right. If they interchange their positions. Neha becomes fourteenth from the left. How many girls are there in the row?
Anonymous Quiz
11%
(a) 25
23%
(b) 27
19%
(c) 29
47%
(d) None of the above
👍6❤1
The average of 17 numbers is 10.9. If the average of first nine numbers is 10.5 and that of the last nine numbers is 11.4, the middle number is
Anonymous Quiz
28%
(a) 11.8
24%
(b) 11.4
41%
(c) 10.9
7%
(d) 11.7
👍6🔥5❤2
In a class, 60% of students are from India and 50% of the students are girls. If 30% of the Indian students are girls, then what percentage of foreign students are boys? (UPSC-2021)
Anonymous Quiz
7%
(a) 45%
25%
(b) 40%
22%
(c) 30%
46%
(d) 20%
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In a test, a candidate attempted only 8 questions and secured 50% marks in each of the questions. If he obtained a total of 40% in the test and all questions in the test carried equal marks, how many questions were there in the test? (UPSC-2015)
Anonymous Quiz
8%
(a) 8
57%
(b) 10
22%
(c) 15
13%
(d) 16
👍7🔥1
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Topic: 10 ✓ LCM & HCF.
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Topic: 10 ✓ LCM & HCF.
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👍3🔥2
In a class of 60 students, where girls are twice that of boys. Kamal ranked seventeenth from the top, if there are 9 girls ahead of Kamal, how many boys are after him in rank?
Anonymous Quiz
5%
(a) 3
19%
(b) 7
66%
(c) 12
10%
(d) 23
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In a school there are 1000 students in the year 1999. The number of students increased by 20% in the year 2000. And it is increased by 15% in the year 2001. But it is decreased by 20% in 2002. Then what is the strength in 2002?
Anonymous Quiz
8%
(a) 1200
16%
(b) 1300
27%
(c) 1150
50%
(d) 1104
👍11
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Topic: 15 ✓ Important Series Sum
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Topic: 15 ✓ Important Series Sum
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Topic: 20 ✓ Clock
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The average marks of a group of 20 students on a test is reduced by 4 when the topper who scored 90 marks is replaced by a new student. How many marks did the new student have?
Anonymous Quiz
9%
(a) 30
50%
(b) 10
25%
(c) 20
16%
(d) 40
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A street vendor has enough money to buy 20 pairs of shoes. If he gets discount of Rs. 25 on each pair of shoe, then he can buy two more pairs of shoes, and still have Rs. 70 left with him. How much money did he have originally?
Anonymous Quiz
5%
(a) Rs. 4500
71%
(b) Rs. 4800
18%
(c) Rs. 5000
5%
(d) Rs. 5200
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👆Ans. B | Explanation:
Let the original price of each pair of shoe be Rs. x.
According to the question,
20x = 22(x – 25) + 70
or, 20x = 22x – 550 + 70
or, 22x – 20x = 480
or, 2x = 480
or, x = Rs. 240
So, the amount of money that street vendor originally had = 20x = 20 × 240 = Rs. 4800
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Let the original price of each pair of shoe be Rs. x.
According to the question,
20x = 22(x – 25) + 70
or, 20x = 22x – 550 + 70
or, 22x – 20x = 480
or, 2x = 480
or, x = Rs. 240
So, the amount of money that street vendor originally had = 20x = 20 × 240 = Rs. 4800
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👍10❤1
A man in his boat can cover 60 km length of a river and come back to his initial point in 4 hrs. If speed of boat is twice that of stream, then what must be the speed of stream?
Anonymous Quiz
19%
a) 15 km/hr
19%
(b) 16 km/hr
54%
(c) 20 km/hr
9%
(d) 10 km/hr
👍3❤1
👆Ans. C | Explanation:
Let, speed of stream = x km/hr.
So, speed of boat = 2x km/hr.
According to the question,
[60/(2x + x)] + [60/(2x - x)] = 4
Or (60/3x) + (60/x) = 4
Or (20/x) + (60/x) = 4
Or 80/x = 4
Or x = 20 km/hr
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Let, speed of stream = x km/hr.
So, speed of boat = 2x km/hr.
According to the question,
[60/(2x + x)] + [60/(2x - x)] = 4
Or (60/3x) + (60/x) = 4
Or (20/x) + (60/x) = 4
Or 80/x = 4
Or x = 20 km/hr
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👍5
A scored 60 more marks than B in an examination. If B scored 10% less marks than A, then how much did B score?
Anonymous Quiz
9%
(a) 360
14%
(b) 480
72%
(c) 540
5%
(d) 420
👍5
👆Ans. C | Explanation:
A scored 60 more marks than B. So, if marks of B are b, then marks of A will be b + 60.
Now, B scored 10% less marks than A. That is, marks of B are 90% of the marks of A.
So, b = 90% of (b + 60)
Or 10b = 9b + 540
Or b = 540
So, B scored 540 marks.
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A scored 60 more marks than B. So, if marks of B are b, then marks of A will be b + 60.
Now, B scored 10% less marks than A. That is, marks of B are 90% of the marks of A.
So, b = 90% of (b + 60)
Or 10b = 9b + 540
Or b = 540
So, B scored 540 marks.
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👍2