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UPSC Insta–DART (Daily Aptitude and Reasoning Test) 1 Nov 2024

Kartavya Desk Staff

Considering the alarming importance of CSAT in UPSC CSE Prelims exam and with enormous requests we received recently, InsightsIAS has started Daily CSAT Test to ensure students practice CSAT Questions on a daily basis. Regular Practice would help one overcome the fear of CSAT too.We are naming this initiative as Insta– DART – Daily Aptitude and Reasoning Test. We hope you will be able to use DART to hit bull’s eye in CSAT paper and comfortably score 100+ even in the most difficult question paper that UPSC can give you in CSP-2021. Your peace of mind after every step of this exam is very important for us.

Looking forward to your enthusiastic participation (both in sending us questions and solving them on daily basis on this portal).

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• Question 1 of 5 1. Question Find the wrong number in the following series. 2442 , 1222 , 614 , 312 ,163 , 90 , 55.75 a) 1.1222 b) 2.312 c) 3.90 d) 4.614 Correct Answer: C Explanation 2442/2 + 1 = 1222 1222/2 + 3= 614 614/2 + 5 = 312 312/2 + 7 =163 163/2 + 9 = 89.5 89.5/2 + 11 = 55.75 Incorrect Answer: C Explanation 2442/2 + 1 = 1222 1222/2 + 3= 614 614/2 + 5 = 312 312/2 + 7 =163 163/2 + 9 = 89.5 89.5/2 + 11 = 55.75

#### 1. Question

Find the wrong number in the following series.

2442 , 1222 , 614 , 312 ,163 , 90 , 55.75

Explanation

2442/2 + 1 = 1222

1222/2 + 3= 614

614/2 + 5 = 312

312/2 + 7 =163

163/2 + 9 = 89.5

89.5/2 + 11 = 55.75

Explanation

2442/2 + 1 = 1222

1222/2 + 3= 614

614/2 + 5 = 312

312/2 + 7 =163

163/2 + 9 = 89.5

89.5/2 + 11 = 55.75

• Question 2 of 5 2. Question Find the wrong number in the following series. 191 341 221 331 251 281 A. 191 B. 331 C. 221 D. 251 Correct Answer: B Explanation 191 + (15 × 10) = 341 341 – (15 × 8) = 221 221 + (15 × 6) = 311 311 – (15 × 4) = 251 251 + (15 × 2) = 281 Incorrect Answer: B Explanation 191 + (15 × 10) = 341 341 – (15 × 8) = 221 221 + (15 × 6) = 311 311 – (15 × 4) = 251 251 + (15 × 2) = 281

#### 2. Question

Find the wrong number in the following series.

191 341 221 331 251 281

Explanation

191 + (15 × 10) = 341

341 – (15 × 8) = 221

221 + (15 × 6) = 311

311 – (15 × 4) = 251

251 + (15 × 2) = 281

Explanation

191 + (15 × 10) = 341

341 – (15 × 8) = 221

221 + (15 × 6) = 311

311 – (15 × 4) = 251

251 + (15 × 2) = 281

• Question 3 of 5 3. Question Direction (3-4) Find the missing number in the given series. 1953.125 781.25 312.5 ? 20 a) 1.48 b) 2.49 c) 3.50 d) 4.51 Correct Answer: C Explanation 1953.125/2.5=781.25 781.25/2.5=312.5 312.5/2.5=125 125/2.5=50 50/2.5=20 Incorrect Answer: C Explanation 1953.125/2.5=781.25 781.25/2.5=312.5 312.5/2.5=125 125/2.5=50 50/2.5=20

#### 3. Question

Direction (3-4) Find the missing number in the given series.

1953.125 781.25 312.5 ? 20

Explanation

1953.125/2.5=781.25

781.25/2.5=312.5

312.5/2.5=125

125/2.5=50

Explanation

1953.125/2.5=781.25

781.25/2.5=312.5

312.5/2.5=125

125/2.5=50

• Question 4 of 5 4. Question 1, 2, 3, 2, 4, 5, 4, 5, ? a) 9 b) 6 c) 10 d) 7 Correct Answer: A Explanation In this series three numbers from a set. The first two numbers of each set are in natural order and the third number is the sum of first and second numbers. The first number of the next set begins with double the first number of the previous set. Incorrect Answer: A Explanation In this series three numbers from a set. The first two numbers of each set are in natural order and the third number is the sum of first and second numbers. The first number of the next set begins with double the first number of the previous set.

#### 4. Question

1, 2, 3, 2, 4, 5, 4, 5, ?

Explanation

In this series three numbers from a set. The first two numbers of each set are in natural order and the third number is the sum of first and second numbers. The first number of the next set begins with double the first number of the previous set.

Explanation

In this series three numbers from a set. The first two numbers of each set are in natural order and the third number is the sum of first and second numbers. The first number of the next set begins with double the first number of the previous set.

• Question 5 of 5 5. Question In the following number series, only one number is wrong. Find out the wrong number. 100, 101, 126, 207, 376, 660, 1106 a) 101 b) 126 c) 660 d) 1106 Correct Answer: A Explanation The pattern of the series is: 100 + 12 = 101 101 + 52 = 126 126 + 92 = 207 207 + 132 = 376 376 + 172 = 665 665 + 212 = 1106 Incorrect Answer: A Explanation The pattern of the series is: 100 + 12 = 101 101 + 52 = 126 126 + 92 = 207 207 + 132 = 376 376 + 172 = 665 665 + 212 = 1106

#### 5. Question

In the following number series, only one number is wrong. Find out the wrong number.

100, 101, 126, 207, 376, 660, 1106

Explanation

The pattern of the series is:

100 + 12 = 101

101 + 52 = 126

126 + 92 = 207

207 + 132 = 376

376 + 172 = 665

665 + 212 = 1106

Explanation

The pattern of the series is:

100 + 12 = 101

101 + 52 = 126

126 + 92 = 207

207 + 132 = 376

376 + 172 = 665

665 + 212 = 1106

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