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Delhi Police Exam Reasoning Study Material

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Non Verbal Reasoning

Select the missing number from the given responses.

a) 324
b) 289
c) 441
d) 361

✔Answer

✔Solution

Correct Answer Is : 324

Solution Is : As, √169 + √64 + v81 = 13 + 8 + 9 = 30 9 in first row ) and √1296 + √576 + √100 = 36 + 24 + 10 = 70 ( in third row) Similarly, √625 + √? + √49 = 50 ⇒ 25 + √? + 7 = 50 √? = 18 ? = 18² = 324

Which diagram correctly represents the relation-ship between Human beings, Teachers, Graduates ?

a)
b)
c)
d)

✔Answer

✔Solution

Correct Answer Is :

Solution Is :

How many triangles are there in the given figure ?

a) 29
b) 43
c) 40
d) 45

✔Answer

✔Solution

Correct Answer Is : 43

Solution Is :

If a mirror is placed on the line MN, then which of the answer figure is the right image of the given figure ?

a)
b)
c)
d)

✔Answer

✔Solution

Correct Answer Is :

Solution Is : Answer figure (c) is the correct mirror image of the question figure.

At a telephone exchange, three phones ring at intervals of 20 sec, 24 sec and 30 seconds. If they ring together at 11 : 25 a.m. When will they next ring together?

a) 11:29 AM
b) 11:27 AM
c) 11:51 AM
d) 12:29 AM

✔Answer

✔Solution

Correct Answer Is : 11:27 AM

Solution Is : LCM of 20 24 and 30 is 120 Hence the phones will ring together after 120 secs i.e. , 2 min at 11.27

If SUN = 108, MOON = 114, what is STAR = ?

a) 124
b) 116
c) 120
d) 122

✔Answer

✔Solution

Correct Answer Is : 116

Solution Is : SUN -----> 19 + 21 + 14 ------> 54 x 2 = 108 MOON ----> 13 + 15 + 15 + 14 ----> 57 x 2 = 114 STAR ----> 19 + 20 + 1 + 18 ---> 58 x 2 = 116

Which number will fit both the series of numbers?
Series A: 1, 4, 9, ......
Series B: 1, 8, 27, ......

a) 42
b) 36
c) 64
d) 25

✔Answer

✔Solution

Correct Answer Is : 64

Solution Is : Series A = Set of Squares of all natural numbers Series B = set of cubes of all natural numbers 64 = Square of 8 = Cuber of 4 Hence , 64 fits in both the sets .

What smallest number should be added to the sum of squares of 15 and 14, so that the resulting number is a perfect square?

a) 17
b) 20
c) 11
d) 9

✔Answer

✔Solution

Correct Answer Is : 20

Solution Is : Square of 15 = 225 Square of 14 = 196 Sum of squares of 14 and 15 = 421 The nearest perfect square to 421 is 441 which is the square of 21 . Hence 441 - 421 = 20 .

Read the following information and answer the following questions below. Bindu is standing exactly in the middle of a line of girls. Asha is 6 th to the left of Bindu and Ritu is 16 th to Bindu`s right.

What is Asha`s position in the line?

a) 22
b) 12
c) 18
d) 11

✔Answer

✔Solution

Correct Answer Is : 11

Solution Is : Considering 33 persons in the line . Bindu who is at middle is 17 th person in the line . Asha is 6 th to the left of Bindu . Asha`s position in the line is (17 - 6) i.e., 11th from the beginning .

Read the following information and answer the following questions below. Bindu is standing exactly in the middle of a line of girls. Asha is 6 th to the left of Bindu and Ritu is 16 th to Bindu`s right.

What should be the minimum number of girls in the line?

a) 27
b) 28
c) 33
d) 30

✔Answer

✔Solution

Correct Answer Is : 33

Solution Is : Ritu is 16 th to the right of Bindu and Bindu is at exact centre . For this to be true, There needs to be a minimum of 16 persons to the left and right of Bindu Total minimum persons = Persons to right of Bindu + person to the left of Bindu + Bindu herself = 16 + 16 +1 = 33

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Delhi Police Exam Reasoning Study Material

Non Verbal Reasoning

Select the missing number from the given responses.

Correct Answer Is : 324

Solution Is : As, √169 + √64 + v81 = 13 + 8 + 9 = 30 9 in first row ) and √1296 + √576 + √100 = 36 + 24 + 10 = 70 ( in third row) Similarly, √625 + √? + √49 = 50 ⇒ 25 + √? + 7 = 50 √? = 18 ? = 182 = 324

Which diagram correctly represents the relation-ship between Human beings, Teachers, Graduates ?

Correct Answer Is :

Solution Is :

How many triangles are there in the given figure ?

Correct Answer Is : 43

Solution Is :

If a mirror is placed on the line MN, then which of the answer figure is the right image of the given figure ?

Correct Answer Is :

Solution Is : Answer figure (c) is the correct mirror image of the question figure.

At a telephone exchange, three phones ring at intervals of 20 sec, 24 sec and 30 seconds. If they ring together at 11 : 25 a.m. When will they next ring together?

Correct Answer Is : 11:27 AM

Solution Is : LCM of 20 24 and 30 is 120 Hence the phones will ring together after 120 secs i.e. , 2 min at 11.27

If SUN = 108, MOON = 114, what is STAR = ?

Correct Answer Is : 116

Solution Is : SUN -----> 19 + 21 + 14 ------> 54 x 2 = 108 MOON ----> 13 + 15 + 15 + 14 ----> 57 x 2 = 114 STAR ----> 19 + 20 + 1 + 18 ---> 58 x 2 = 116

Which number will fit both the series of numbers? Series A: 1, 4, 9, ...... Series B: 1, 8, 27, ......

Correct Answer Is : 64

Solution Is : Series A = Set of Squares of all natural numbers Series B = set of cubes of all natural numbers 64 = Square of 8 = Cuber of 4 Hence , 64 fits in both the sets .

What smallest number should be added to the sum of squares of 15 and 14, so that the resulting number is a perfect square?

Correct Answer Is : 20

Solution Is : Square of 15 = 225 Square of 14 = 196 Sum of squares of 14 and 15 = 421 The nearest perfect square to 421 is 441 which is the square of 21 . Hence 441 - 421 = 20 .

Read the following information and answer the following questions below. Bindu is standing exactly in the middle of a line of girls. Asha is 6 th to the left of Bindu and Ritu is 16 th to Bindu`s right. What is Asha`s position in the line?

Correct Answer Is : 11

Solution Is : Considering 33 persons in the line . Bindu who is at middle is 17 th person in the line . Asha is 6 th to the left of Bindu . Asha`s position in the line is (17 - 6) i.e., 11th from the beginning .

Read the following information and answer the following questions below. Bindu is standing exactly in the middle of a line of girls. Asha is 6 th to the left of Bindu and Ritu is 16 th to Bindu`s right. What should be the minimum number of girls in the line?

Correct Answer Is : 33

Solution Is : Ritu is 16 th to the right of Bindu and Bindu is at exact centre . For this to be true, There needs to be a minimum of 16 persons to the left and right of Bindu Total minimum persons = Persons to right of Bindu + person to the left of Bindu + Bindu herself = 16 + 16 +1 = 33

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Solution Is : As, √169 + √64 + v81 = 13 + 8 + 9 = 30 9 in first row ) and √1296 + √576 + √100 = 36 + 24 + 10 = 70 ( in third row) Similarly, √625 + √? + √49 = 50 ⇒ 25 + √? + 7 = 50 √? = 18 ? = 18² = 324

Which number will fit both the series of numbers?
Series A: 1, 4, 9, ......
Series B: 1, 8, 27, ......

Read the following information and answer the following questions below. Bindu is standing exactly in the middle of a line of girls. Asha is 6 th to the left of Bindu and Ritu is 16 th to Bindu`s right.

What is Asha`s position in the line?

Read the following information and answer the following questions below. Bindu is standing exactly in the middle of a line of girls. Asha is 6 th to the left of Bindu and Ritu is 16 th to Bindu`s right.

What should be the minimum number of girls in the line?