Simplification Questions for RRB JE PDF
Download Top 20 RRB JE Simplification Questions and Answers PDF. RRB JE Maths questions based on asked questions in previous exam papers very important for the Railway JE exam
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Question 1: If the roots of the equation
a)
b)
c)
d)
Question 2: If
a)
b)
c)
d)
Question 3: If
a)
b)
c)
d)
Question 4: If
a) -1
b) 1
c) 0
d) 2
Question 5: If
a) 0
b) -1
c) 2
d) 4
Question 6: If
a) 4
b) 3
c) 2
d) 0
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Question 7: Find the value of x from the given equations.
7x + 3y + 5z = 27
6x + 6y + 10z = 14
a) 4
b) 11
c) 5
d) 9
Question 8: Find the value of
a)
b)
c)
d)
Question 9: If
a) 314
b) 322
c) 328
d) 316
Question 10: Find the value of x from the given equations.
7x + 3y + 5z = 27
6x + 6y + 10z = 14
a) 4
b) 11
c) 5
d) 9
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Question 11: Find the value of
a)
b)
c)
d)
Question 12: If
a) 314
b) 322
c) 328
d) 316
Question 13: Find the value of
a)
b)
c)
d)
Question 14: Find the value of
a)
b)
c)
d)
Question 15: If
a) 2
b) 6
c) 8
d) 4
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Question 16: If
a) 140
b) 138
c) 134
d) 136
Question 17: If
a) 36
b) 24
c) 42
d) 30
Question 18: If
a) 322
b) 348
c) 329
d) 342
Question 19: If
a) (1,0)
b) (2,1)
c) (1,0)
d) (4,1)
Question 20: If
a) -6
b) -2
c) -4
d) -5
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Answers & Solutions:
1) Answer (A)
Given
p=3.5 and q=1
Roots of the new equation are p+1 an q+1 i.e 4.5 and 2
2) Answer (D)
Squaring on both sides we have
Adding 2 on both sides
3) Answer (B)
Squaring on both sides we have
Subtracting 2 on both sides
4) Answer (C)
If
5) Answer (C)
⇒
⇒
Sum of two squares is zero when both the numbers are zero.
⇒
⇒
In all the cases,
Hence, option C is the correct answer.
6) Answer (C)
Given,
Dividing with x on both sides
⇒
Cubing on both sides
⇒
⇒
⇒
⇒
7) Answer (C)
7x + 3y + 5z = 27 → (1)
6x + 6y + 10z = 14 → (2)
Multiplying equation (1) by 2 and subtracting (2) from (1) we get
8x = 40
⇒ x = 5
Hence, option C is the correct answer.
8) Answer (B)
9) Answer (B)
Given,
Squaring on both sides
Cubing above equation on both sides
⇒
⇒
⇒
⇒
10) Answer (C)
7x + 3y + 5z = 27 → (1)
6x + 6y + 10z = 14 → (2)
Multiplying equation (1) by 2 and subtracting (2) from (1) we get
8x = 40
⇒ x = 5
Hence, option C is the correct answer.
11) Answer (B)
12) Answer (B)
Given,
Squaring on both sides
Cubing above equation on both sides
⇒
⇒
⇒
⇒
13) Answer (B)
14) Answer (C)
15) Answer (A)
Add 2 on both sides
(
Subtracting 2 on both sides
(
16) Answer (A)
Add 2 on both sides
(
Subtracting 2 on both sides
x-1/x=5
Cubing on both sides we have
17) Answer (A)
Add 2 on both sides
Subtracting 2 on both sides
x-1/x=3
Cubing on both sides we have
18) Answer (A)
Given,
Squaring both sides,
Cubing on both sides,
19) Answer (C)
Given,
x = -2 and x = -3 should satisfy
Substituting the values,
When,
When,
Subtracting both,
Substituting the value of
Hence,
20) Answer (B)
Given,
we need to solve 3rd degree equation
so,without solving, by verification, we get
so the answer is option B.
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