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RRB NTPC Exam Reasoning & General Intelligence Study Material

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Arithmetical Reasoning

Arrange the given dates of birth in descending chronology.
1. 15.04.1950
2. 14.05.1960
3. 14.06.1960
4. 20.04.1950
5. 25.05.1960

a) 1, 5, 2, 3, 4
b) 1, 3, 2, 4, 5
c) 1, 4, 2, 5, 3
d) 1, 2, 4, 5, 3

✔Answer

✔Solution

Correct Answer Is : 1, 4, 2, 5, 3

Solution Is :

The total number of students in class A and class B is 120 . If 15 students from class A are taken and added to class B, the number in Class B becomes twice that of A. Find out the number of students in Class A in the beginning .

a) 80
b) 65
c) 55
d) 40

✔Answer

✔Solution

Correct Answer Is : 55

Solution Is : Suppose total number of students in class
A = x
Total number of students in class B = 120 -x
Then , (120-x +15 ) = 2 ( x - 15 )
135 - x = 2x - 30
3x = 165
x = 165 / 3
x = 55

If ? stands for / ,+ stands for x,/ stands for ? and x stands for +,find out which one of the following is correct?

a) 49+7-3x5/8=20
b) 49-7+3/5x8=24
c) 49x7+3/5-8=16
d) 49/7x3+5-8=26

✔Answer

✔Solution

Correct Answer Is : 49-7+3/5x8=24

Solution Is : In option b signs interchanging according to the question
49-7+3/5x8=24
49/7x3-5+8 = 24
7x3-5+8=24
29-5=24
24=24

If 5=5,6=12,7=21,8=32 ,then 9 is equal to

a) 9
b) 27
c) 36
d) 45

✔Answer

✔Solution

Correct Answer Is : 45

Solution Is : 5≠1 = 5
6≠2=12
7≠3=21
8≠4=32
9≠5=45

Which among the following is a leap year?

a) 1600
b) 1900
c) 1800
d) All of these

✔Answer

✔Solution

Correct Answer Is : 1600

Solution Is : Centuries should be divided by 400 hence only 1600 is divided by 400 , hence 1600 is a leap year

If 20 + 3 =15 and 15 + 4 =30 ,then 12 + 6 =?

a) 36
b) 27
c) 60
d) 9

✔Answer

✔Solution

Correct Answer Is : 27

Solution Is :

Select the correct combination of mathematical signs to replace `x` signs and to balance the given equation.
9x7x2x3x 10

a) / ≠ + =
b) - + / =
c) + - ≠ =
d) - + ≠ =

✔Answer

✔Solution

Correct Answer Is : + - ≠ =

Solution Is : The combination of mathematical signs (+ - * =)
9+7-2*3=10
16-6=10

Select the correct combination of mathematical signs to replace `` signs and to balance given equations
24 34 * 2 * 5 * 12

a) + / x =
b) = / + -
c) = / - +
d) + / = x

✔Answer

✔Solution

Correct Answer Is : = / - +

Solution Is : According to option c ,
24 = 34 / 2 - 5 + 12 ---> 24 = 17 - 5 + 12 ---> 24 = 29 - 5 --> 24 = 24

If + means minus , - means multiply , / means plus and x means divide , then
10 x 5 / 3 - 2 + 3 = ?

a) 5
b) 53/3
c) 21
d) 36

✔Answer

✔Solution

Correct Answer Is : 5

Solution Is : ? = 10 x 5 / 3 - 2 + 3 = 10 / 5 + 3 x 2 -3
= 2 + 3 x 2 - 3 = 2 + 6 - 3 = 8 - 3 = 5

Select the related word/ letter/ numbers from the given alternatives.
Joel and Tom were traveling from Town X to Town Y which was 210 km apart. Joel set off 1 h 15 min later than Tom but arrived 15 min earlier. If the average speed of Tom was 42 km/hr, find the average speed of Joel.

a) 50 km/hr
b) 60 km/hr
c) 65 km/hr
d) 70 km/hr

✔Answer

✔Solution

RRB NTPC Exam Reasoning & General Intelligence Study Material

Arithmetical Reasoning

Arrange the given dates of birth in descending chronology. 1. 15.04.1950 2. 14.05.1960 3. 14.06.1960 4. 20.04.1950 5. 25.05.1960

Correct Answer Is : 1, 4, 2, 5, 3

Solution Is :

The total number of students in class A and class B is 120 . If 15 students from class A are taken and added to class B, the number in Class B becomes twice that of A. Find out the number of students in Class A in the beginning .

Correct Answer Is : 55

Solution Is : Suppose total number of students in class A = x Total number of students in class B = 120 -x Then , (120-x +15 ) = 2 ( x - 15 ) 135 - x = 2x - 30 3x = 165 x = 165 / 3 x = 55

If ? stands for / ,+ stands for x,/ stands for ? and x stands for +,find out which one of the following is correct?

Correct Answer Is : 49-7+3/5x8=24

Solution Is : In option b signs interchanging according to the question 49-7+3/5x8=24 49/7x3-5+8 = 24 7x3-5+8=24 29-5=24 24=24

If 5=5,6=12,7=21,8=32 ,then 9 is equal to

Correct Answer Is : 45

Solution Is : 5≠1 = 5 6≠2=12 7≠3=21 8≠4=32 9≠5=45

Which among the following is a leap year?

Correct Answer Is : 1600

Solution Is : Centuries should be divided by 400 hence only 1600 is divided by 400 , hence 1600 is a leap year

If 20 + 3 =15 and 15 + 4 =30 ,then 12 + 6 =?

Correct Answer Is : 27

Solution Is :

Select the correct combination of mathematical signs to replace `x` signs and to balance the given equation. 9x7x2x3x 10

Correct Answer Is : + - ≠ =

Solution Is : The combination of mathematical signs (+ - * =) 9+7-2*3=10 16-6=10

Select the correct combination of mathematical signs to replace `*` signs and to balance given equations 24 * 34 * 2 * 5 * 12

Correct Answer Is : = / - +

Solution Is : According to option c , 24 = 34 / 2 - 5 + 12 ---> 24 = 17 - 5 + 12 ---> 24 = 29 - 5 --> 24 = 24

If + means minus , - means multiply , / means plus and x means divide , then 10 x 5 / 3 - 2 + 3 = ?

Correct Answer Is : 5

Solution Is : ? = 10 x 5 / 3 - 2 + 3 = 10 / 5 + 3 x 2 -3 = 2 + 3 x 2 - 3 = 2 + 6 - 3 = 8 - 3 = 5

Select the related word/ letter/ numbers from the given alternatives.Joel and Tom were traveling from Town X to Town Y which was 210 km apart. Joel set off 1 h 15 min later than Tom but arrived 15 min earlier. If the average speed of Tom was 42 km/hr, find the average speed of Joel.

Correct Answer Is : 60 km/hr

Solution Is :

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Arrange the given dates of birth in descending chronology.
1. 15.04.1950
2. 14.05.1960
3. 14.06.1960
4. 20.04.1950
5. 25.05.1960

Solution Is : Suppose total number of students in class
A = x
Total number of students in class B = 120 -x
Then , (120-x +15 ) = 2 ( x - 15 )
135 - x = 2x - 30
3x = 165
x = 165 / 3
x = 55

Solution Is : In option b signs interchanging according to the question
49-7+3/5x8=24
49/7x3-5+8 = 24
7x3-5+8=24
29-5=24
24=24

Solution Is : 5≠1 = 5
6≠2=12
7≠3=21
8≠4=32
9≠5=45

Select the correct combination of mathematical signs to replace `x` signs and to balance the given equation.
9x7x2x3x 10

Solution Is : The combination of mathematical signs (+ - * =)
9+7-2*3=10
16-6=10

Select the correct combination of mathematical signs to replace `` signs and to balance given equations
24 34 * 2 * 5 * 12

Solution Is : According to option c ,
24 = 34 / 2 - 5 + 12 ---> 24 = 17 - 5 + 12 ---> 24 = 29 - 5 --> 24 = 24

If + means minus , - means multiply , / means plus and x means divide , then
10 x 5 / 3 - 2 + 3 = ?

Solution Is : ? = 10 x 5 / 3 - 2 + 3 = 10 / 5 + 3 x 2 -3
= 2 + 3 x 2 - 3 = 2 + 6 - 3 = 8 - 3 = 5

Select the related word/ letter/ numbers from the given alternatives.
Joel and Tom were traveling from Town X to Town Y which was 210 km apart. Joel set off 1 h 15 min later than Tom but arrived 15 min earlier. If the average speed of Tom was 42 km/hr, find the average speed of Joel.