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

Number System · Rajasthan Board (RBSE) STD 6 (Rajasthan - English Medium). 30 questions.

Questions

M.C.Q. [1 Marks Each]

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30 questions · auto-graded multiple-choice test.

MCQ 11 Mark
Mark $(\checkmark)$ against the correct answer: What comes just before $1000000?$
  • A
    $99999$
  • ✓
    $999999$
  • C
    $9999999$
  • D
    None of these.
Answer
Correct option: B.
$999999$
The number just before $1000000$ is $999999$ (i.e., $1000000 - 1).$
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MCQ 21 Mark
Mark $(\checkmark)$ against the correct answer in the following:Which of the symbols are never repeated?
  • A
    $V, X $ and $C.$
  • B
    $V, X$ and $D.$
  • ✓
    $V, L$ and $D.$
  • D
    $L, K$ and $C.$
Answer
Correct option: C.
$V, L$ and $D.$
In Roman numerals, $V, L$ and $D$ are never repeated and never subtracted.
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MCQ 31 Mark
Mark $(\checkmark)$ against the correct answer: The place value of $6$ in the numeral $48632950$ is:
  • A
    $6$
  • B
    $632950$
  • ✓
    $600000$
  • D
    $486$
Answer
Correct option: C.
$600000$
Place value of $6 = 6$ lakhs
$= (6 \times 100000)$
$= 600000$
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MCQ 41 Mark
Mark $(\checkmark)$ against the correct answer: Which of the following is not meaningful?
  • A
    $XIV$
  • ✓
    $XVV$
  • C
    $XIII$
  • D
    $XXII$
Answer
Correct option: B.
$XVV$
$V, L$ and $D$ are never repeated. Thus, $XVV$ is meaningless.
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MCQ 51 Mark
Mark $(\checkmark)$ against the correct answer: The smallest counting number is:
  • A
    $0$
  • ✓
    $1$
  • C
    $10$
  • D
    None of these.
Answer
Correct option: B.
$1$
The smallest counting number is $1.$
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MCQ 61 Mark
Mark $(\checkmark)$ against the correct answer in the following: One million = ___________.
  • A
    $1$ lakh.
  • ✓
    $10$ lakh.
  • C
    $100$ lakh.
  • D
    $1$ crore.
Answer
Correct option: B.
$10$ lakh.
$1$ million $(1,000,000) = 10$ lakh $(10 \times 1,00,000)$
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MCQ 71 Mark
Mark $(\checkmark)$ against the correct answer: The face value of $4$ in the numeral $89247605$ is:
  • ✓
    $4$
  • B
    $40000$
  • C
    $47605$
  • D
    $8924$
Answer
Correct option: A.
$4$
The face value of a digit remains as it is irrespective of the place it occupies in the place value chart.
Thus, the face value of $4$ is always $4$ irrespective of where it may be.
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MCQ 81 Mark
Mark $(\checkmark)$ against the correct answer: Which of the following is not meaningful?
  • ✓
    $VX$
  • B
    $XV$
  • C
    $XXV$
  • D
    $XXXV$
Answer
Correct option: A.
$VX$
$V, L$ and $D$ are never subtracted. Thus, $VX$ is wrong.
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MCQ 91 Mark
Mark $(\checkmark)$ against the correct answer in the following: Which of the following Roman numerals is correct?
  • ✓
    $XC$
  • B
    $XD$
  • C
    $DM$
  • D
    $VL$
Answer
Correct option: A.
$XC$
$X$ can be subtracted from $L$ and $C$ only.
i.e., $XC = (100 - 10) = 90$
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MCQ 101 Mark
Mark $(\checkmark)$ against the correct answer: Which of the following is not meaningful?
  • A
    $CI$
  • B
    $CII$
  • ✓
    $IC$
  • D
    $XC$
Answer
Correct option: C.
$IC$
$I$ can be subtracted from $V$ and $X$ only. Thus, $IC$ is wrong.
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MCQ 111 Mark
Mark $(\checkmark)$ against the correct answer: The difference between the place value and the face value of $5$ in the numeral $78653421$ is:
  • A
    $53416$
  • B
    $4995$
  • ✓
    $49995$
  • D
    None of these.
Answer
Correct option: C.
$49995$
Place value of $5 = 5 \times 10000 = 50000$
Face value of $5 = 5$
$\therefore$ Required difference $= 50000 - 5 = 49995$
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MCQ 121 Mark
Mark $(\checkmark)$ against the correct answer in the following: $1$ Lakh = ___________ thousands.
  • A
    $10$
  • ✓
    $100$
  • C
    $1000$
  • D
    None of these.
Answer
Correct option: B.
$100$
One lakh $(100000)$ is equal to one hundred thousand $(100,000).$
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MCQ 131 Mark
Mark $(\checkmark)$ against the correct answer in the following: How many times does the digit $9$ occur between $1$ and $100?$
  • A
    $11$
  • B
    $15$
  • C
    $18$
  • ✓
    $20$
Answer
Correct option: D.
$20$
Between $1$ and $100$, the digit $9$ occurs in $9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98$ and $99.$
$\therefore$ The digit occurs $20$ times between $1$ and $100.$
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MCQ 141 Mark
Mark $(\checkmark)$ against the correct answer in the following: $(7268 - 2427)$ estimated to the nearest hundred is:
  • ✓
    $4900$
  • B
    $4800$
  • C
    $4841$
  • D
    $5000$
Answer
Correct option: A.
$4900$
$7268$ will be rounded off to the nearest hundred as $7300.$
$2427$ will be rounded of to the nearest hundred as $2400.$
$\therefore 7300 - 2400 = 4900$
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MCQ 151 Mark
Mark $(\checkmark)$ against the correct answer in the following: No Roman numeral can be repeated more than _______ times.
  • A
    Two.
  • ✓
    Three.
  • C
    Four.
  • D
    None of these.
Answer
Correct option: B.
Three.
No Roman numeral can be repeated more than three times.
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MCQ 161 Mark
Mark $(\checkmark)$ against the correct answer: How many $7-$digit numbers are there?
  • A
    $8999999$
  • ✓
    $9000000$
  • C
    $10000000$
  • D
    None of these.
Answer
Correct option: B.
$9000000$
The largest seven-digit number$ = 9999999$
The smallest seven-digit number $= 1000000$
Total number of seven-digit numbers $= (9999999 - 1000000) + 1$
$= 8999999 + 1$
$= 9000000$
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MCQ 171 Mark
Mark $(\checkmark)$ against the correct answer:
How many $8$-digit numbers are there?
  • A
    $99999999$
  • B
    $89999999$
  • ✓
    $90000000$
  • D
    None of these.
Answer
Correct option: C.
$90000000$
The largest eight-digit number $= 99999999$
The smallest eight-digit number$ = 10000000$
Total number of eight-digit numbers $= (99999999 - 10000000) + 1$
$= 89999999 + 1$
$= 90000000$
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MCQ 181 Mark
Mark $(\checkmark)$ against the correct answer in the following: $1512$ when round off to the nearest hundred is:
  • A
    $1600$
  • ✓
    $1500$
  • C
    $1510$
  • D
    None of these.
Answer
Correct option: B.
$1500$
The number is $1512$. Its digit at the tens place is $1 < 5$
.So, the given number is rounded off to the nearest hundred as $1500.$
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MCQ 191 Mark
Mark $(\checkmark)$ against the correct answer: How many $4-$digit numbers are there?
  • A
    $8999$
  • ✓
    $9000$
  • C
    $8000$
  • D
    None of these.
Answer
Correct option: B.
$9000$
The largest four$-$digit number $= 9999$
The smallest four$-$digit number $= 1000$
Total number of all four$-$digit numbers $= (9999 - 1000) + 1$
$= 8999 + 1$
$= 9000$
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MCQ 241 Mark
How many 8-digit numbers are there ?
  • A
    99999999
  • B
    89999999
  • ✓
    90000000
  • D
    none of these
Answer
Correct option: C.
90000000
C
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MCQ 251 Mark
How many 7-digit numbers are there ?
  • A
    8999999
  • ✓
    9000000
  • C
    1000000
  • D
    none of these
Answer
Correct option: B.
9000000
B
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MCQ 281 Mark
The difference between the place value and the face value of 5 in the numeral 78653421 is
  • A
    53416
  • B
    4995
  • ✓
    49995
  • D
    none of these
Answer
Correct option: C.
49995
C
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