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[WpProQuiz 7556]Missing number series
Directions (01 – 05): What value should come in the place of (?) in the following number series?
1) 1, 145, 266, ?, 447, 511
a) 286
b) 296
c) 336
d) 366
e) 378
2) 19, 40, 82, 166, 334, ?
a) 429
b) 450
c) 670
d) 680
e) 720
3) 14, 24, 36, 50, 66, ?
a) 70
b) 72
c) 78
d) 80
e) 84
4) 13, 37, 65, 97, 133, ?
a) 192
b) 189
c) 173
d) 166
e) 150
5) 9, 30, 74, 143, 239, ?
a) 364
b) 376
c) 388
d) 399
e) 339
Caselet
Directions (6 – 10): Study the following information carefully and answer the questions given below.
A school has the number of boys to girls in the ratio of 5: 4 and the each of them like at least one of two languages Tamil and English. One – third of the student likes both Tamil and English. 280 girls like Tamil. 33.33% of the boys like both Tamil and English. One – fifth of the boys like only English and 8/15th of the girls like only English.
6) What is the difference between the number of girls like only English and the number of boys like only Tamil?
a) 120
b) 150
c) 170
d) 190
e) 180
7) The number of girls like both languages is what percent of the total number of boys like Tamil?
a) 30%
b) 40%
c) 50%
d) 60%
e) None of these
8) Find the total number of students in the school.
a) 2000
b) 2200
c) 2400
d) 1500
e) None of these
9) What is the ratio of the number of boys like English to the number of girls like English?
a) 15: 11
b) 11: 7
c) 17: 13
d) 15: 13
e) None of these
10) The number of boys only like English is approximately what percent of the total number of girls in the school?
a) 58%
b) 46%
c) 48%
d) 50%
e) 52%
Answers :
Directions (1-5) :
1) Answer: d)
1 + 122 = 145
145 + 112 = 266
266 + 102 = 366
366 + 92 = 447
447 + 82 = 511
2) Answer: c)
19 * 2 + 2 = 40
40 * 2 + 2 = 82
82 * 2 + 2 = 166
166 * 2 + 2 = 334
334 * 2 + 2 = 670
3) Answer: e)
22 + 10 = 14
32 + 15 = 24
42 + 20 = 36
52 + 25 = 50
62 + 30 = 66
72 + 35 = 84
4) Answer: c)
13 + 24 = 37
37 + 28 = 65
65 + 32 = 97
97 + 36 = 133
133 + 40 = 173
5) Answer: a)
9 + (21 * 1) = 30
30 + (22 * 2) = 74
74 + (23 * 3) = 143
143 + (24 * 4) = 239
239 + (25 * 5) = 364
Directions (6 – 10):
Total number of students = 9x
Total number of girls = 4x
Total number of boys = 5x
Total girls like only English = 8/15th of the total girls
Total girls like only English to total girls = 8: 15
Number of girls like Tamil = 15y – 8y = 7y = 280
= > y = 280/7 = 40
Total girls like only English = 8 * 40 = 320
Total girls = 40 * 15 = 600
Total boys = 600/4 * 5 = 750
Total students like both Tamil and English = (600 + 750)/3 = 450
Total boys like both Tamil and English = 33.33% of 750 = 250
Total girls like both Tamil and English = 450 – 250 = 200
Total girls like Only Tamil = 280 – 200 = 80
Total boys like only English = 750 * 1/5 = 150
Total boys like only Tamil = 750 – (250 + 150)
= 750 – 400 = 350
6) Answer: c)
Difference = 320 – 150 = 170
7) Answer: c)
Required percentage = (200/400) * 100 = 50%
8) Answer: e)
Total students in the school = 750 + 600 = 1350
9) Answer: d)
Required ratio = 600: 520
= 15: 13
10) Answer: a)
Required percentage = (350/600) * 100 = 58%
