Free Knowing Our Numbers 03 Practice Test - 6th grade
Question 1
The collection of numbers which start with the predecessor of 1 are known as _____.
SOLUTION
Solution : A
Whole numbers start from 0 and it is the number system which starts with the predecessor of 1.
Question 2
Expand 34879.
SOLUTION
Solution : C
In 34879, 3 is in 10000's place, 4 is in 1000's place, 8 is in 100's place, 7 is in 10's place and 9 is in 1's place.
So, 34879=3×10000+4×1000+8×100+7×10+9×1
Question 3
Insert commas suitably and write the number, 50801592 according to the Indian number system.
SOLUTION
Solution : A
According to Indian number system, correct way to write 50801592 is 5,08,01,592.
Question 4
Estimate: 5,873 - 436 to the nearest hundreds.
SOLUTION
Solution : C
5873 - 436 = 5437
5437 is less than 5450, the mid point of 5400 and 5500.
Hence, 5437 rounded off to the nearest hundreds is 5400.
Question 5
XLVI + LXX = ______
SOLUTION
Solution : B
Let us first convert the Roman numerals into Hindu-Arabic numerals.
When a Roman numeral with the larger value is on the left, we add the values together and when it is on the left, we subtract the values.
∴ XLVI = (50 - 10 ) + 5 + 1
= 56 - 10
= 46
LXX = 50 + 10 + 10
= 70
∴ XLVI + LXX = 46 + 70 = 116
But, 116 = 100 + 16 = C + XVI = CXVI.
∴ XLVI + LXX = CXVI
Question 6
The smallest three-digit number that can be formed using 6, 3 and 8 without repetition is
SOLUTION
Solution :Using the digits 6, 3 and 8 the smallest number that can be formed is 368 and the largest will be 863.
Question 7
If in number 9846768
SOLUTION
Solution :Place value of 6 at I = 6000
Place value of 6 at II = 60
⇒Place value of 6 at IPlace value of 6 at II=600060
= 100
Question 8
Forty lakh seventy thousand and eight can be written using numerals as
SOLUTION
Solution :Forty lakh seventy thousand and eight = 40,70,008.
Question 9
In a set of natural numbers there exists a definite largest number.
True
False
SOLUTION
Solution : B
In a set of natural numbers, the largest number cannot be determined.
Question 10
Pavan says 1 lakh = Ten Thousand. Is he correct?
True
False
SOLUTION
Solution : B
1 Lakh = 100000
1 Thousand = 1000
∴1Lakh=HundredThousand