Questions · Page 3 of 3

M.C.Q (1 Marks)

MCQ 1011 Mark
The least number that is divisible by all the numbers from 1 to 10 (both inclusive) is
  • A
    10
  • B
    100
  • C
    504
  • 2520
Answer
Correct option: D.
2520
D
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MCQ 1021 Mark
The product of a non-zero rational number and an irrational number is
  • A
    always rational
  • always irrational
  • C
    rational or irrational
  • D
    none of these
Answer
Correct option: B.
always irrational
B
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MCQ 1031 Mark
$\pi$ is
  • A
    a rational number
  • an irrational number
  • C
    a prime number
  • D
    an odd number
Answer
Correct option: B.
an irrational number
B
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MCQ 1041 Mark
The HCF of two numbers is 18 and their product is 12960 . Their LCM will be
  • A
    420
  • B
    600
  • 720
  • D
    800
Answer
Correct option: C.
720
C
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MCQ 1051 Mark
The LCM of $2^3 \times 3^2$ and $2^2 \times 3^3$ is
  • A
    $2^3$
  • B
    $3^3$
  • $2^3 \times 3^3$
  • D
    $2^2 \times 3^2$
Answer
Correct option: C.
$2^3 \times 3^3$
C
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MCQ 1061 Mark
$\sqrt{5}+\sqrt{3}+2$ is
  • A
    a natural number
  • B
    an integer
  • C
    a rational number
  • an irrational number
Answer
Correct option: D.
an irrational number
D
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MCQ 1071 Mark
The smallest irrational number by which $\sqrt{18}$ should be multiplied so as to get a rational number is
  • A
    $\sqrt{18}$
  • B
    $2 \sqrt{2}$
  • $\sqrt{2}$
  • D
    2
Answer
Correct option: C.
$\sqrt{2}$
C
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MCQ 1081 Mark
The decimal expansion of $\pi$ is
  • A
    terminating
  • non-terminating non-repeating
  • C
    non-terminating
  • D
    doesnot exist
Answer
Correct option: B.
non-terminating non-repeating
B
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MCQ 1091 Mark
If $\operatorname{HCF}(26,169)=13$, then $\operatorname{LCM}(26,169)=$
  • A
    26
  • B
    52
  • 338
  • D
    13
Answer
Correct option: C.
338
C
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MCQ 1111 Mark
In Q. No. 6, $\operatorname{HCF}(a, b)$ is
  • $p q$
  • B
    $p^3 q^3$
  • C
    $p^3 q^2$
  • D
    $p^2 q^2$
Answer
Correct option: A.
$p q$
A
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MCQ 1121 Mark
If two positive ingeters $a$ and $b$ are expressible in the form $a=p q^2$ and $b=p^3 q ; p, q$ being prime numbers, then $\operatorname{LCM}(a, b)$ is
  • A
    $p q$
  • B
    $p^3 q^3$
  • $p^3 q^2$
  • D
    $p^2 q^2$
Answer
Correct option: C.
$p^3 q^2$
C
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MCQ 1131 Mark
If two positive integers $a$ and $b$ are written as $a=x^3 y^2$ and $b=x y^3$, where $x, y$ are prime numbers, then the result obtained by dividing the product of the positive integers $a, b$ by the $\operatorname{LCM}(a, b)$ is
  • A
    $x y$
  • $x y^2$
  • C
    $x^3 y^3$
  • D
    $x^2 y^2$
Answer
Correct option: B.
$x y^2$
B
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MCQ 1141 Mark
The sum of the exponents of the prime factors in the prime factorisation of 196 , is
  • A
    1
  • B
    2
  • 4
  • D
    6
Answer
Correct option: C.
4
C
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MCQ 1151 Mark
If $n=2^3 \times 3^4 \times 5^4 \times 7$, then the number of consecutive zeros in $n$, where $n$ is a natural number, is
  • A
    2
  • 3
  • C
    4
  • D
    7
Answer
Correct option: B.
3
B
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MCQ 1161 Mark
The LCM of two numbers is 1200 . Which of the following cannot be their HCF?
  • A
    600
  • 500
  • C
    400
  • D
    200
Answer
Correct option: B.
500
B
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M.C.Q (1 Marks) - Page 3 - MATHS STD 10 Questions - Vidyadip