6th Grade > Mathematics
KNOWING OUR NUMBERS MCQs
Total Questions : 99
| Page 2 of 10 pages
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We can compare two numbers by comparing their place values. So by comparing the place values, we can find that Goutham scored maximum i.e. 98910.
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Concept: 1 Mark
Solution: 1 Mark
If we want to find the greatest 5 digit number, we will use the greatest digit, which is 9, in each place value, of all the five digits.
Hence, the price of the lehenga is 99,999, which is the largest five digit number.
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When we are comparing two numbers, either of the two things can happen.
i. One of the numbers has a greaternumber of digits. or
ii. Both the numbers have the equal number of digits.
When one of the numbers has a greater number of digits, then the one which has a greater number of digits is greater.
If the number of digits is equal, then the following steps are followed:
i. The number with the greater valued digit on the extreme left is greater.
ii. If the digits on the extremeleft of the numbers are equal, then the digits to the right of the extreme left digits are compared and so on.
Therefore, Megha is rich right now.
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Steps: 2 Marks
Actual Amount: 1 Mark
Estimated Amount: 1 Mark
We need to estimate 1398 - 526.
1398 > 526.
∴we willround off these numbers to the nearest hundreds.
1398 can be rounded off to 1400.
526 can be rounded off to 500.
Estimated difference:
1400 - 500 = 900
The actual amount left with him= 1398 - 526 = 872
The difference between the estimated amount left to him, and the actual amount left with him=900 - 872 = 28.
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Each option: 1 Mark
1 Kilogram = 1,000 grams.
a. 40 Kilograms = 40 × 1000 =40,000 grams.
b. 120 kilograms = 120 × 1000= 1,20,000 grams.
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Concept: 1Mark
Steps: 2 Marks
Answer: 1 Mark
The given digits are 1,3,5,7,6.
Now to find the greatest number, we will arrange the given digitsin descending order, i.e. the greatest number to the extreme left, then the next one and so on.
To find the smallest number, we will arrange the digits in an ascending order, i.e. the smallest number to the extreme left and so on.
Greatest number = 76531
Smallest number = 13567
Difference = 76531 - 13567 = 62964
Similarly,
The greatest 4 digit number that can be formed using the given digits = 7653
The least 4 digit number that can be used using the given digits = 1356
The difference between the greatest and the least=7653 - 1356 = 6297
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(a) 74,836 = 7 × 10000 + 4 × 1000 + 8 × 100 + 3 ×10+ 6 × 1
(b) 5,74,021 = 5 × 100000 + 7 × 10000 + 4 × 1000 + 2× 10 + 1×1
(c) 89,07,010 = 8 × 1000000 + 9 × 100000 + 7 × 1000 + 10 × 1
(d) 9,99,99,999 = 9×10000000 + 9×1000000 + 9×100000 + 9×10000 + 9×1000 + 9×100 + 9×10 + 9× 1
(e) 1,00,001 = 1×100000 + 0×10000 + 0×1000 + 0×100 + 0×10+1× 1
(f) 545 = 5×100 + 4×10 + 5× 1
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Natural Numbers: 1 Mark each
The smallest natural number is 1 and there is no largest natural numberas we have infinite natural numbers.
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Concept: 1 Mark
Steps: 1 Mark
Answer: 1 Mark
1L=1000ml
Capacity of bottle = 1.5 ×1000= 1500ml
Capacity of glass = 50ml
Number of glasses that can be filled = 1500 ÷50 = 30 glasses
Now if the capacity of glasses = 60ml.
Then, thenumber of glasses that can be filled =1500 ÷60= 25 glasses
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Steps: 2 Marks
Answer: 1 Mark
The population of a town in 1991 = 78787
and the population of that town in 2001 = 95833
78787 is rounded off the nearest hundreds
= 78800
95833 is rounded off to nearest hundreds
= 95800
∴ Estimated increase in population
= 95800 – 78800 = 17000
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