6th Grade > Mathematics
KNOWING OUR NUMBERS MCQs
:
C
If Ram distributes all the chocolates to his friends, then he is left with nothing i.e with 0 chocolates. Whole numbers are set of natural numbers and 0.
W = { 0, 1, 2, 3, ... }
:
A
The largest number formed by using the given digits is 97421 and the smallest digit number formed is 12479. So the difference between them can be calculated as,
97421 - 12479 = 84942.
:
A and B
Total cost can be calculated as
By first calculating the cost of individual purchase of both Vignesh and Gautam and then adding them
i.e. 10×10+10×7=Rs.170
Or
First, calculate the total number of notebooks and then find the total cost
i.e. (10+7)×10=Rs.170
Hence, both the methods are correct.
:
D
The largest digit formed by given digits will be 98754, but there is no limit on repetition. So the largest number that can be formed will be 99999.
:
Pavan had 60 chocolates. He gave 10 to Herman, so he is left with 50 chocolates. Herman already had 55 chocolates, now he got 10 more from Pavan, so he has 65 chocolates in total. So Herman has more chocolates.
:
A
During the month of June, his expense was less so his savings will be more in the month of June.
:
B
We can compare two numbers by comparing their place values. So by comparing the place values, we can find that 18426 is greater than 15921. So, Sachin has scored more runs in ODI matches.
:
Total money spent =20×4+5×40=280
So he spent Rs 280.
:
C
We know that X = 10 and L = 50.
When a Roman numeral with the larger value is on the left, we add the values together and when it is on the right, we subtract the values.
∴ XL = 40
Also, XXX = 10 + 10 + 10 = 30.
∴ XXX + XL = 40 + 30 = 70
But, 70 = 50 + 10 + 10 = L + X + X = LXX.
∴ XXX + XL = LXX
:
We know that,
1m = 1000 mm
1cm = 10 mm
∴ 65 cm = 65×10 = 650mm
∴ The height of the person = 1000 + 650 = 1650mm