Mental arithmetic - class-VI

Question 1 Multiple Choice (Single Answer)

Round off to nearest lakhs: The given number is $38,65,62,048$

$38,68,60,000$
$38,65,600$
$38,65,00,000$
$38,66,00,000$

Question 2 Multiple Choice (Single Answer)

Round off $231$ to nearest $100.$

$200$
$300$
$250$
$350$

Question 3 Multiple Choice (Single Answer)

Round off $829$ to nearest $100$.

$800$
$700$
$900$
$850$

Question 4 Multiple Choice (Single Answer)

Round off $7065$ to nearest $1000$ :

$700$
$7000$
$70$
$7$

Question 5 Multiple Choice (Single Answer)

Round off $63$ to nearest $10$

$60$
$70$
$65$
$63$

Question 6 Multiple Choice (Single Answer)

Round off the following number to the nearest $10$ and $100$:
$1634$

$1630,1600$
$1640,1730$
$1740,1700$
$1640,1734$

Question 7 Multiple Choice (Single Answer)

Round-off $76,890$ to nearest $10$.

$76,890$
$76,880$
$76,900$
$77,000$

Question 8 Multiple Choice (Single Answer)

Round-off $4353$ to nearest $100$.

$4353$
$4350$
$4360$
$4400$

Question 9 Multiple Choice (Single Answer)

Round-off $52,398$ to nearest $1000$.

$52,390$
$52,400$
$52,000$
$53,000$

Question 10 Multiple Choice (Single Answer)

Round-off $3789$ to nearest $100$

$3789$
$3790$
$3800$
$4000$

Question 11 Multiple Choice (Single Answer)

Round-off $47,897$ to nearest $1000$.

$47,897$
$48,000$
$47,900$
$47,890$

Question 12 Multiple Choice (Single Answer)

Fill in the blanks.
(i) The number 825642 rounded off to nearest thousand is P  .
(ii) Estimated product of 4023 and 198 is   Q  .
(iii) CXXXI is written in Hindu-Arabic numeral as   R .
P Q R

820000 800000 131
826000 800000 131
826000 850000 135
825000 800000 135

Question 13 Multiple Choice (Single Answer)

State 'T' for true and 'F' for false.
I. Rounding off $2560$ to the nearest thousand, we get $2000$.
II. Place value of $9$ in $974304200 $ is ninety crore.
Ill. $1$ lakh $= 1000$ thousand
IV. Roman numeral for the smallest four-digit number is $M$.
I II III IV

T F T F
F F T T
T T T T
F T F T

Question 14 Multiple Choice (Single Answer)

Estimate the difference of $15875 $ and $7892$ by rounding off each number to nearest hundred.

$7983$
$8100$
$7900$
$8000$

Question 15 Multiple Choice (Single Answer)

What will be the rounded off sum of these figures, $2.303 + 6.66 $ to two decimal point?

$8.969$
$8.96$
$8.9$
$8.97$

Question 16 Multiple Choice (Single Answer)

Mark the correct alternative of the following.
Total number of numbers which when rounded off to nearest ten give us $200$ is?

$9$
$10$
$8$
$7$

Question 17 Multiple Choice (Single Answer)

Mark the correct alternative of the following.
The difference between the greatest and smallest numbers which when rounded off a number to the nearest tens as $540$, is?

$10$
$9$
$8$
$11$

Question 18 Multiple Choice (Single Answer)

Mark the correct alternative of the following.
The smallest number which when rounded off to the nearest hundred as $600$, is?

$550$
$595$
$604$
$599$

Question 19 Multiple Choice (Single Answer)

Mark the correct alternative of the following.
The greatest number which when rounded off to the nearest thousand as $7000$, is?

$6500$
$6549$
$7499$
$6499$

Question 20 Multiple Choice (Single Answer)

Mark the correct alternative of the following.
The difference between the greatest and smallest numbers which when rounded off a number to the nearest hundred as $6700$, is?

$100$
$99$
$98$
$101$

Question 21 Multiple Choice (Single Answer)

Mark the correct alternative of the following.
$2985$ is rounded off to the nearest hundred and the nearest tens. The difference between the two values is?

$5$
$100$
$10$
$150$

Question 22 Multiple Choice (Single Answer)

Mark the correct alternative of the following.
$1827$ when rounded off to be nearest hundred is?

$1900$
$1820$
$1850$
$1800$

Question 23 Multiple Choice (Single Answer)

Round off 11,125 to thousand place

11,000
12,000
11,120
1,100

Question 24 Multiple Choice (Single Answer)

Round off to nearest thousands. The given number is 76,823

$76,000$
$75,000$
$77,000$
$78,000$

Question 25 Multiple Choice (Single Answer)

Round off to nearest thousands. The given number is 24,500

$24,400$
$24,600$
$25,000$
$24,000$

Question 26 Multiple Choice (Single Answer)

Find the product of 5 and the difference between 328 tenths and 4587 thousandths. Round off your answer to 1 decimal place.

$146.9$
$141.1$
$139.2$
$140.2$

Question 27 Multiple Choice (Single Answer)

Round off $690$ to nearest $100$.

$780$
$690$
$700$
$800$

Question 28 Multiple Choice (Single Answer)

Round off to the nearest $10, 100,$ and $1000$:
$1289$

$1290,1389,1009$
$1290,1300,1000$
$1280, 1300, 1200$
$1280,1200,1000$

Question 29 Multiple Choice (Single Answer)

Round-off $13$ to nearest $10$.

$10$
$20$
$13$
$1$

Question 30 Multiple Choice (Single Answer)

$(7268 - 2427)$ estimated to the nearest hundred is

$4800$
$4900$
$4841$
$5000$

Question 31 Multiple Choice (Single Answer)

Rohit's teacher asked him to tell the correct answer after performing the steps given.
$\bullet$ Round off $43, 98$ and $250$ to nearest tens.
$\bullet$ After rounding off, add them.
$\bullet$ Round off the sum to the nearest hundreds.
Then, the correct answer is __________.

$300$
$400$
$350$
$480$

Mental arithmetic - class-VI

Questions