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In the following number series only one number is wrong. Find out the wrong number.
15, 17, 38, 120, 490, 2450, 14712
The pattern of the series is
15 × 1 + 2 = 17
17 × 2 + 4 = 38
38 × 3 + 6 = 120
120 × 4 + 8 = 488
488 × 5 + 10 = 2450
2450 × 6 + 12 = 14712
Find the wrong term in the given series:
1, 3, 21, 66, 131, 221
The Pattern of the series is:
Thus, the incorrect number is 21.
So option (A) is the correct answer.
In the following series one number is wrong, Find the wrong number in the series.
763, 729, 661, 559, 437, 253
The pattern of the series is:
763 – 17 × 2 = 729
729 – 17 × 4 = 661
661 – 17 × 6 = 559
559 – 17 × 8 = 423
423 – 17 × 10 = 253
Hence the incorrect number is 437.
47, 56, 92, 173, 317, 562, 866
47 + 32 = 56
56 + 62 = 92
92 + 92 = 173
173 + 122 = 317
317 + 152 = 542
542 + 182 = 866
Hence the incorrect number is 562.
Find the wrong number in the given series.
365, 189, 101, 57, 40, 24
The pattern of the series:
35 should be come in the place of 40.
Hence, option C is correct.
Directions For Questions
Direction: Study the following information carefully and answer the given question.
The given below table shows the average number of persons living in colony P and Q in four years. It also shows the ratio of number of persons living in colony P and Q in those four years.
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What is the difference between the average number of persons who live in two colonies in year 2019 and the average number of persons who live in the two colonies in year 2022?
Required difference = 720 – 660 = 60
The number of persons who live in colony Q in 2021 is by what percent more than the number of persons who live in colony P in the same year?
The total number of persons who live in colony Q in 2019 & 2021 together is what percent of the total number of persons who live in colony P in 2019 & 2020 together?
Total number of persons who live in colony P in 2019 & 2020 = 600 + 900 = 1500
Total number of persons who live in colony Q in 2019 & 2021 = 720 + 540 = 1260
Among the persons of colony P in year 2022 the ratio of males to females is 7 : 9. If the number of females of colony Q in year 2022 are 40% less than the number of males in that colony in the same year, what is the ratio between the number of males of two colonies in year 2022?
Let the number of males of colony Q in 2022 be x.
Then, x + 0.6x = 800
⇒ 1.6x = 800
⇒ x = 500
Required ratio = 280 : 500 = 14 : 25
The number of government employees in colony P in 2021 is equal to 2.5% of the number of persons of colony Q in 2019. If the ratio of number of entrepreneurs living in colony P in 2021 to the number of government employees living in same colony in the same year is 2 : 3, find the number of entrepreneurs living in colony P in 2021
Number of government employees in colony P in 2021 = 2.5% of 720
Number of entrepreneurs living in colony P in 2021 = 18/3 × 2 = 12
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