RBSE Class 6 Maths Important Questions Chapter 1 Knowing Our Numbers

Rajasthan Board RBSE Class 6 Maths Important Questions Chapter 1 Knowing Our Numbers Important Questions and Answers.

RBSE Class 6 Maths Chapter 1 Important Questions Knowing Our Numbers

Multiple Choice Questions

Question 1.
When one is added to the greatest 3-digit number what is the result?
(a) Smallest 3-digit number
(b) Greatest 3-digit number
(c) Greatest 4-digit number
(d) Smallest 4-digit number
Answer:
(d) Smallest 4-digit number

Question 2.
Which is the greatest and smallest 4-digit number?
(a) 99,999
(b) 1000,9999
(c) 9999,1000
(d) 9999,10000
Answer:
(c) 9999,1000

 

Question 3.
If we add 1 more to the greatest 6-digit numbers, we get:
(a) Smallest 6-digit number
(b) Smallest 5-digit number
(c) Smallest 7-digit number
(d) Smallest 4-digit number
Answer:
(c) Smallest 7-digit number

Question 4.
The smallest 8-digit number is called:
(a) Ten lakh
(b) One lakh
(c) Ten crore
(d) One crore
Answer:
(d) One crore

Question 5.
One crore is similar to:
(a) 10 hundred
(b) 100 thousand
(c) 1000 lakh
(d) 100 lakh
Answer:
(d) 100 lakh

Question 6.
Write the numeral for the numbers eight crore four lakh thirty one:
(a) 80400310
(b) 80400031
(c) 84000031
(d) None of these
Answer:
(b) 80400031

Question 7.
1 million is equal to how many lakh?
(a) 1000
(b) 100
(c) 10
(d) None of these
Answer:
(c) 10

Question 8.
Which pair has same digit at hundreds place?
(a) 4232,4341
(b) 2334,2340
(c) 4592,4692
(d) 9002, 8102
Answer:
(b) 2334,2340

Question 9.
2985 is rounded off to the nearest hundred and nearest tens. The difference between the two values is :
(a) 5
(b) 100
(c) 10
(d) 150
Answer:
(c) 10

Question 10.
Which of the following is meaningful?
(a) VX 
(b) IC 
(c) XLIV 
(d) IVC
Answer:
(c) XLIV 

Fill in the Blanks

Question 1.
Write the following in Roman numerals :
(a) 4201 =
(b) 10009 = 
(c) 44000 = 
Answer:
(a) ĪV̄ CCI,
(b) X̄ IX,
(c) XLĪV, 

Question 2.
The smallest and the greatest numbers which are rounded off to the nearest hundreds as 900 are __________  and __________
Answer:
850, 949

Question 3.
One kilogram = __________   milligram.
Answer:
ne million

Question 4.
__________ lakhs make a billion.
Answer:
ten thousand

Question 5.
Write each of the following in expanded form:
(a) 3057 = 
(b) 12345 = 
Answer:
(a)3000 + 50 + 7,
(b) 10000 + 2000 + 300 + 40 + 5

State whether True or False

Question 1.
1 crore is equal to 1000 ten thousand.
Answer:
True.

Question 2.
Seven million three hundred three thousand two hundred six can be written as 7,303,2006.
Answer:
False

Question 3. 
Ten thousand lakh make a billion.
Answer:
True.

Question 4.
The largest and smallest four-digit numbers formed using 7,1, 0 and 5 are 7,510 and 1,057.
Answer:
True.

Very Short Answer Type Questions

Question 1.
How many thousands make a crore?
Answer:
One crore = 1,00,00,000
= 10,000  × 1,000
Thus, 10,000 thousand make a crore.

Question 2.
What comes just before 10000000? 
Answer:
10000000 - 1 = 9999999.

Question 3.
Write all three digit number using 2,3,4 taking each digit only once.
Answer:
234, 243, 324, 432, 342, 423.

Question 4.
Arrange the numbers in descending order:
63521047, 7354206, 63514759, 7355014, 102345680 
Answer:
102345680 > 63521047 > 63514759 > 7355014 > 7354206

Question 5.
Arrange the numbers in ascending order:
9873426, 24615019, 990357, 9874012, 24620010 .
Answer:
990357 < 9873426 < 9874012 < 24615019<24620010

Question 6. 
How many thousands make a million?
Answer:
1 million = 1,000,000 = 1000 thousand.
∴ 1000 thousands make a million.

Question 7.
How many million make a billion? 
Answer:
1000 million make a billion.
∴ 1 billion = 1,000,000,000 = 1000 million.

Short Answer Type Questions 

Question 1. 
How many 6 digit numbers are there in all?
Answer:
The largest 6 digit number = 999999
The smallest 6 digit number = 100000
Therefore, total number of 6 digit numbers = (999999 - 100000) + 1 
= 899999 + 1 
= 9,00,000
= 9 lakh

Question 2.
Population of Sundra Nagar was 2,35,471 in the year 1991. In the year 2001, it was found to have increased by 72,958. How was the population of the city in 2001?
Answer:
The population of Sundra Nagar in 2001
= Population in 1991 + Increase in population
= 2,35,471 + 72,958
∴ Population in 2001 = 3,08,429

Question 3.
The town newspaper is published every day. One copy has 12 pages. Ev,ery day 11,980 copies are printed. How many pages in all are printed every day and every month?
Answer:
Number of pages in 1 copy of newspaper = 12
No. of pages in 11,980 copies of newspaper = 11,980 × 12
= 1,43,760
Thus, 1,43,760 pages are printed every day.
No. of pages printed in a month
= 1,43,760 × 30 
= 43,12,800 

Question 4.
A vessel has 4 litre 650 mL of curd. In how many glasses, each of 25 mL capacity, can it be distributed?
Answer:
Total amount of curd = 4 litre 650 mL = 4 × 1000 + 650 mL = 4650 mL.
The number of glasses in which curd can be distributed
= \(\frac{\text { Total amount of curd }}{\text { Capacity of each glass }}=\frac{4,650 \mathrm{~mL}}{25 \mathrm{~mL}}\) = 186
Therefore, number of glasses in which curd can be distributed = 186