Mcq on linear equations in one variables with answers
Answers
Answer:
1-The value of ‘x’ in 3x – 4 = 7 is
(A) 1
(B) 11/3
(C) 3/11
(D) 7/12
(Ans: B)
2-On solving x/2 + 5/3 = -1/2, we get x =
(A) -13/3
(B) -3/13
(C) 13/3
(D) 3/13
(Ans: A)
3-In 15/4 – 7x = 9, x=
(A) 4/3
(B) 3/4
(C) -4/3
(D) -3/4
(Ans: D)
4-Sum of two numbers is 84. One of the numbers is 20 more than the other. The smaller number is
(A) 12
(B) 22
(C) 32
(D) 42
(Ans: C)
5-What should be added to thrice the rational number -5/2 to get 2/7?
(A) 107/5
(B) 5/107
(C) 14/109
(D) 109/14
(Ans: D)
6-The perimeter of a rectangle is 30cm. If its breadth is 3cm then its length is
(A) 4.5cm
(B) 5cm
(C) 5.5cm
(D) 6cm
(Ans: B)
7-The present age of Sonu is 1/3rd of his father’s present age. After 4 years the sum of their ages will be 60 years. The present age of Sonu is
(A) 11 years
(B) 12 years
(C) 13 years
(D) 14 years
(Ans: C)
8-Salim has 4 times as many one rupees coins as he has five rupees coins. If he has a total of 81 rupees then the denomination of one rupee coin he has
(A) 30
(B) 36
(C) 42
(D) 46
(Ans: B)
9-The sum of three consecutive multiple of 9 is 81. The smallest number is
(A) 9
(B) 18
(C) 27
(D) 36
(Ans: B)
10-The difference between two numbers is 44. The ratio of these numbers is 3:5. The smaller number is
(A) 22
(B) 44
(C) 66
(D) 88
(Ans: C)
11-The solution of 4x + 5/2 = 1/2x – 7 is
(A) x = -19/7
(B) x = -7/19
(C) x = 19/7
(D) x = 7/19
(Ans: A)
12-The digits of a two digit number differ by 2. If the digits are interchanged and resulting number is added to original number. We get 88, the original number is
(A) 13
(B) 24
(C) 35
(D) 57
(Ans: C)
13-Rahul is thrice as old as Sulekha. Four years ago his age was four times Sulekha’s age. The present age of Rahul is
(A) 8 years
(B) 12 years
(C) 24 years
(D) 36 years
(Ans: D)
14-The value of ‘x’ if (x-5)/3 – (x-3)/5, is
(A) 6
(B) 8
(C) 10
(D) 12
(Ans: B)
15-On solving (x-1)/(2x+3) = 1/3, x =
(A) 2
(B) 3
(C) 4
(D) 5
(Ans: B)
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