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MATHS M.C.Q. [1 Marks Each]

Direct & Inverse Proportion · Gujarat Board (GSEB) STD 8 (GSEB - English Medium). 15 questions.

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M.C.Q. [1 Marks Each]

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15 questions · timed · auto-graded

MCQ 11 Mark
The number of teeth and the age of a person vary
  • A
    directly with each other
  • B
    inversely with each other
  • C
    neither directly nor inversely with each other
  • ✓
    sometimes directly and sometimes inversely with each other
Answer
Correct option: D.
sometimes directly and sometimes inversely with each other
D
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MCQ 21 Mark
If two quantities $p$ and $q$ vary inversely with each other, then
  • A
    $\frac{p}{q}$ remains constant
  • B
    $p+q$ remains constant
  • ✓
    $p \times q$ remains constant
  • D
    $p-q$ remains constant
Answer
Correct option: C.
$p \times q$ remains constant
C
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MCQ 31 Mark
Both $x$ and $y$ are in direct proportion, then $\frac{1}{x}$ and $\frac{1}{y}$ are
  • ✓
    in direct proportion
  • B
    in inverse proportion
  • C
    neither in direct nor in inverse proportion
  • D
    sometimes in direct and sometimes in inverse proportion
Answer
Correct option: A.
in direct proportion
A
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MCQ 41 Mark
In which of the following cases, $x$ and $y$ vary inversely as each other?
(i) Time taken to travel a given distance if speed changes
(ii) The number of people and time taken to complete a work
(iii) The length of a journey and the price of the ticket
  • A
    Only (i)
  • B
    Only (ii)
  • C
    Only (iii)
  • ✓
    (i) and (ii)
Answer
Correct option: D.
(i) and (ii)
D
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MCQ 51 Mark
Both $u$ and $v$ vary directly with each other. When $u$ is $10, v$ is 15 , which of the following is not a possible pair of corresponding values of $u$ and $v$ ?
  • ✓
    15 and 20
  • B
    2 and 3
  • C
    25 and 37.5
  • D
    16 and 24
Answer
Correct option: A.
15 and 20
A
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MCQ 61 Mark
Meenakshee cycles to her school at an average speed of $12 km / h$ and takes 20 min to resch her school. If she wants to reach her school in 12 min , then her average speed should be
  • A
    $\frac{20}{3} km / h$
  • B
    $16 km / h$
  • ✓
    $20 km / h$
  • D
    $15 km / h$
Answer
Correct option: C.
$20 km / h$
C
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MCQ 71 Mark
A cow eats 18 kg of corn $\ln 12$ days. How much does he eat in 9 days?
  • A
    11.5 kg
  • B
    12.5 kg
  • C
    14.5 kg
  • ✓
    13.5 kg
Answer
Correct option: D.
13.5 kg
D
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MCQ 81 Mark
10 m of wire cost ₹ 1000. What will 4 m cost?
  • ✓
    ₹ 400
  • B
    ₹ 200
  • C
    ₹ 800
  • D
    ₹ 100
Answer
Correct option: A.
₹ 400
A
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MCQ 91 Mark
If 100 boys took 20 days to clean a garden. How many days it will take to clean the garden if $2 5$ more boys and added?
  • A
    80
  • B
    12
  • C
    40
  • ✓
    16
Answer
Correct option: D.
16
D
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MCQ 101 Mark
Ridham types 200 words in 30 min . How many words he will type in 12 min ?
  • A
    60
  • ✓
    80
  • C
    40
  • D
    100
Answer
Correct option: B.
80
B
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MCQ 111 Mark
If 300 kg of mangoes cost ₹ 6000, then find the cost of 120 kg of mangoes?
  • A
    ₹ 4200
  • B
    ₹ 3200
  • ✓
    ₹ 2400
  • D
    ₹ 1200
Answer
Correct option: C.
₹ 2400
C
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MCQ 121 Mark
18 workers can do a work in $1 8 0$ days. If two more workers join this work, then the work will be completed in
  • A
    140 days
  • B
    150 days
  • C
    158 days
  • ✓
    162 days
Answer
Correct option: D.
162 days
D
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MCQ 131 Mark
If 12 m uniform rod weight 42 kg , then the welght of 5 m rod of the same type will be
  • A
    16.5 kg
  • B
    15.2 kg
  • ✓
    17.5 kg
  • D
    18.2 kg
Answer
Correct option: C.
17.5 kg
C
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MCQ 141 Mark
If the weight of 9 sheets of thick paper is 30 g , how many sheets of the same paper would weight $1 \frac{1}{4} kg$ ?
  • ✓
    375
  • B
    250
  • C
    925
  • D
    300
Answer
Correct option: A.
375
A
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MCQ 151 Mark
If a represents cost of apples and brepresents number of apples bought which option shows that $a$ and bare In direct proportion?
  • A
    $a_1 b_1=a_2 b_2=a_3 b_3=\ldots=k$
  • ✓
    $\frac{a_1}{b_1}=\frac{a_2}{b_2}=\frac{a_1}{b_3}=\ldots=k$
  • C
    $a_1^2 b_1^2=a_2^2 b_2^2=a_3^2 b_3^2=\ldots=k$
  • D
    None of these
Answer
Correct option: B.
$\frac{a_1}{b_1}=\frac{a_2}{b_2}=\frac{a_1}{b_3}=\ldots=k$
B
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M.C.Q. [1 Marks Each] - MATHS STD 8 Questions - Vidyadip