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

Square and Square Roots · UP Board (UPMSP) STD 8 (UPMSP - English Medium). 210 questions.

Questions · Page 5 of 5

M.C.Q. [1 Marks Each]

MCQ 2011 Mark
The smallest number by which $54$ should be multiplied so as to get a perfect square is:
  • A
    $2$
  • B
    $3$
  • C
    $4$
  • ✓
    $6$
Answer
Correct option: D.
$6$
$54 \times 6 = 324 = 18^2$
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MCQ 2021 Mark
Tick $(\checkmark)$ the correct answer of the following: $\sqrt{0.1}=\ ?$
  • A
    $0.1$
  • B
    $0.01$
  • ✓
    $0.316$
  • D
    None of these.
Answer
Correct option: C.
$0.316$
$\begin{array}{c|c}&0.316\\\hline3&0.\overline{10}\ \overline{00}\ \overline{00}\\&9\ \ \ \ \ \\\hline61&100\\&\ \ \ 61\\\hline626&\ \ \ \ \ \ \ 3900\\&\ \ \ \ \ \ \ 3756\\\hline&\ \ \ \ \ \ \ \ \ \ 144\\\end{array}$
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MCQ 2031 Mark
Which of the following number would have digit $1$ at units place?
  • ✓
    $81^2$
  • B
    $18^2$
  • C
    $54^2$
  • D
    $95^2$
Answer
Correct option: A.
$81^2$
 $81^2$
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MCQ 2041 Mark
Which of the following is a Pythagorean triplet?
  • ✓
    $(6, 8, 10)$
  • B
    $(5, 12, 18)$
  • C
    $(3, 4, 7)$
  • D
    None of these.
Answer
Correct option: A.
$(6, 8, 10)$
$(6, 8, 10)$
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MCQ 2051 Mark
The next two numbers in the number pattern $16, 25, 36, 49$ are:
  • ✓
    $64, 81$
  • B
    $64, 83$
  • C
    $64, 88$
  • D
    $62, 81$
Answer
Correct option: A.
$64, 81$
We have, $16, 25, 36, 49$ and so on.
It can be seen that the number pattern can be written as $(4)^2, (5)^2, (6)^2, (7)^2$
It is clear that the next two numbers are $(8)^2$ and $(9)^2$ i.e. $64$ and $81.$
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MCQ 2061 Mark
The students of class VIII of a school donated Rs $10000$ in all, for Prime Minister’s National Relief Fund. Each student donated as many rupees as the number of students in the class. The number of students in the class is:
  • A
    $10$
  • ✓
    $100$
  • C
    $1000$
  • D
    $10000$
Answer
Correct option: B.
$100$
$\sqrt{10000}=100$
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MCQ 2071 Mark
The value of $\sqrt{{99}} \text{x} \sqrt{396}$ is:
  • ✓
    $198$
  • B
    $208$
  • C
    $254$
  • D
    None of these.
Answer
Correct option: A.
$198$
$198$
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MCQ 2081 Mark
The square of which of the following numbers will be odd?
  • A
    $10$
  • B
    $100$
  • C
    $1000$
  • ✓
    $99$
Answer
Correct option: D.
$99$
$\therefore$ $99$ is odd
$\therefore$ Its square will be odd.
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MCQ 2091 Mark
The value of $\sqrt{248+\sqrt{52+\sqrt{144}}}$ is:
  • A
    $14$
  • B
    $12$
  • ✓
    $16$
  • D
    $13$
Answer
Correct option: C.
$16$
We have, $\sqrt{248+\sqrt{52+\sqrt{144}}}$
$=\sqrt{248+\sqrt{52+12}}$ $[\because$ square root of $144 = 12$$]$
$=\sqrt{248+\sqrt{64}}$
$=\sqrt{248+8}$ $[\because$ square root of $64 = 8$$]$
$=\sqrt{256}=16$ $[\because$ square root of $256 = 16$$]$
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MCQ 2101 Mark
The one’s digit of the cube of $23$ is:
  • A
    $6$
  • ✓
    $7$
  • C
    $3$
  • D
    $9$
Answer
Correct option: B.
$7$
We know that, the cubes of the numbers ending with digits $3$ and $7$, have $7$ and $3$ at one’s digit, respectively.
So, the one’s digit of the cube of $23$ is $7$.
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M.C.Q. [1 Marks Each] - Page 5 - MATHS STD 8 Questions - Vidyadip