Q1Written answer
Write the next three natural numbers after 10999.
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Worked solution
The next three natural numbers after 10999 are 11000, 11001 and 11002.
NCERT · Class 6 · Maths
Chapter 2: Whole Numbers
Practice each question, then open the answer or worked solution.
Questions
8 questionsQ2Written answer
Write the three whole numbers occurring just before 10001.
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Worked solution
The three whole numbers occurring just before 10001 are 10000, 9999 and 9998.
Q3Written answer
Which is the smallest whole number?
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Worked solution
The smallest whole number is 0.
Q4Written answer
How many whole numbers are there between 32 and 53?
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Worked solution
The whole numbers between 32 and 53 are as follows:
(33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
Hence, there are 20 whole numbers between 32 and 53
Q5Written answer
Write the successor of:
(a) 2440701 (b) 100199 (c) 1099999 (d) 2345670
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Worked solution
The successors are
(a) 2440701 + 1 = 2440702
(b) 100199 + 1 = 100200
(c) 1099999 + 1 = 1100000
(d) 2345670 + 1 = 2345671
Q6Written answer
Write the predecessor of:
(a) 94 (b) 10000 (c) 208090 (d) 7654321
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Worked solution
The predecessors are
(a) 94 – 1 = 93
(b) 10000 – 1 = 9999
(c) 208090 – 1 = 208089
(d) 7654321 – 1 = 7654320
Q7Written answer
In each of the following pairs of numbers, state which whole number is on the left of the other number on the number line. Also, write them with the appropriate sign (>, <) between them.
(a) 530, 503 (b) 370, 307 (c) 98765, 56789 (d) 9830415, 10023001
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Worked solution
(a) 530 > 503
Hence, 503 is on the left side of 530 on the number line.
(b) 370 > 307
Hence, 307 is on the left side of 370 on the number line.
(c) 98765 > 56789
Hence, 56789 is on the left side of 98765 on the number line.
(d) 9830415 < 10023001
Hence, 9830415 is on the left side of 10023001 on the number line
Q8Written answer
Which of the following statements are true (T) and which are false (F)?
(a) Zero is the smallest natural number.
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Worked solution
False
0 is not a natural number.
(b) 400 is the predecessor of 399.
False
The predecessor of 399 is 398 because (399 – 1 = 398)
(c) Zero is the smallest whole number.
True
Zero is the smallest whole number.
(d) 600 is the successor of 599.
True
Since (599 + 1 = 600)
(e) All natural numbers are whole numbers.
True
All natural numbers are whole numbers.
(f) All whole numbers are natural numbers.
False
0 is a whole number but is not a natural number.
(g) The predecessor of a two-digit number is never a single-digit number.
False
For example, the predecessor of 10 is 9.
(h) 1 is the smallest whole number.
False
0 is the smallest whole number.
(i) The natural number 1 has no predecessor.
True
The predecessor of 1 is 0, but it is not a natural number.
(j) The whole number 1 has no predecessor.
False
0 is the predecessor of 1 and is a whole number.
(k) The whole number 13 lies between 11 and 12.
False
13 does not lie between 11 and 12.
(l) The whole number 0 has no predecessor.
True
The predecessor of 0 is -1 and is not a whole number.
(m) The successor of a two-digit number is always a two-digit number.
False
For example, the successor of 99 is 100