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

Exponents and Powers · Gujarat Board (GSEB) STD 8 (GSEB - English Medium). 15 questions.

Questions

M.C.Q. [1 Marks Each]

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15 questions · auto-graded multiple-choice test.

MCQ 11 Mark
The mass of Earth is $5.97 \times 10^{24} kg$, whereas Jupiter has a mass of $1.8986 \times 10^{27} kg$. About how many times massive is Jupiter than
  • A
    3
  • B
    31
  • C
    300
  • ✓
    318
Answer
Correct option: D.
318
D
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MCQ 21 Mark
The distance of planet Neptune from the Sun is 4495000000000000 km . Which of the following can be another way of representing the distance (in km ) between the Neptune and the Sun?
  • A
    $4.495 \times 10^{14}$
  • ✓
    $4.495 \times 10^{15}$
  • C
    $4.495 \times 10^{16}$
  • D
    $4.495 \times 10^{17}$
Answer
Correct option: B.
$4.495 \times 10^{15}$
B
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MCQ 31 Mark
Multiplicative inverse of $\left(2^{-2}+3^{-2}+4^{-2}\right)^{-1}$ is
  • ✓
    $\frac{61}{144}$
  • B
    $\frac{144}{61}$
  • C
    $\frac{-61}{144}$
  • D
    $-\frac{144}{61}$
Answer
Correct option: A.
$\frac{61}{144}$
A
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MCQ 41 Mark
The value of $\left(5^6+5^9\right) \times 5^{-5}$ is equal to
  • A
    $5^9$
  • ✓
    $5^{-8}$
  • C
    $5^8$
  • D
    $5^{-9}$
Answer
Correct option: B.
$5^{-8}$
B
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MCQ 51 Mark
If $x=(50)^{1-6}+(50)^{-2}$, then the value of $x^{-3}$ is
  • ✓
    $50^9$
  • B
    $\frac{1}{50^9}$
  • C
    $-50^9$
  • D
    $\frac{-1}{50^9}$
Answer
Correct option: A.
$50^9$
A
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MCQ 61 Mark
If $\frac{8^{2 n+1}}{8^{-3}}=8^5$, then the value of $n$ is
  • ✓
    $\frac{1}{2}$
  • B
    $\frac{-1}{2}$
  • C
    2
  • D
    -2
Answer
Correct option: A.
$\frac{1}{2}$
A
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MCQ 71 Mark
The standard form of 5126000 is
  • A
    $5.126 \times 10^4$
  • ✓
    $5.126 \times 10^6$
  • C
    $5.126 \times 10^{-4}$
  • D
    $5.126 \times 10^{-6}$
Answer
Correct option: B.
$5.126 \times 10^6$
B
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MCQ 81 Mark
The usual form of $2.08 \times 10^{-5}$ is
  • ✓
    $0.0000208$
  • B
    $0.000028$
  • C
    $0.000208$
  • D
    $0.0002080$
Answer
Correct option: A.
$0.0000208$
A
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MCQ 91 Mark
The standard form of 0.000072 is
  • A
    $72 \times 10^4$
  • B
    $72 \times 10^{-4}$
  • C
    $7.2 \times 10^5$
  • ✓
    $7.2 \times 10^{-5}$
Answer
Correct option: D.
$7.2 \times 10^{-5}$
D
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MCQ 111 Mark
The value of $\left(\frac{5}{8}\right)^{-3}$ is equal to
  • A
    $\frac{-125}{512}$
  • ✓
    $\frac{512}{125}$
  • C
    $\frac{125}{512}$
  • D
    1
Answer
Correct option: B.
$\frac{512}{125}$
B
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MCQ 131 Mark
The reciprocal of $\left(\frac{3}{7}\right)^{-1}$ is
  • A
    $\frac{7}{3}$
  • B
    $-\frac{3}{7}$
  • C
    $-\frac{7}{3}$
  • ✓
    $\frac{3}{7}$
Answer
Correct option: D.
$\frac{3}{7}$
D
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MCQ 141 Mark
The multiplicative inverse of $10^{-1000}$ is
  • A
    $10^{-100}$
  • B
    $-10^{1000}$
  • ✓
    $10^{1000}$
  • D
    $-10^{100}$
Answer
Correct option: C.
$10^{1000}$
C
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