NCERT Solutions for Class 6 Maths Chapter 2 Whole Numbers Exercise 2.1 help students learn about the basic concepts covered in the exercise, which include an introduction to Whole Numbers, Natural Numbers and Number Line. Numbers are mainly used to find the number of objects we see in our daily lives. The problems related to the concepts covered in the first exercise of the chapter are solved by the experts at TEXTUAL SOLUTION. These NCERT Solutions are explained well to help the students understand the problem-solving techniques in a better way.
NCERT Solution for Mathematics Chapter 2 Class 6 Exercise 2.1 - Whole Numbers
1. Write the next three natural numbers after 10999.
Solution :
The next three natural numbers after 10999 are
10999 + 1, 10999 + 2 and 10999 + 3 i.e., 11000, 11001 and 11002.
2. Write the three whole numbers occuring just before 10001.
Solution :
The three whole numbers occuring just before 10001 are 10001 - 1, 10001 - 2 and 10001 - 3 i.e., 10000, 9999 and 9998.
3. Which is the smallest whole number ?
Solution :
The smallest whole number is 0.
4. How many whole numbers are there between 32 and 53 ?
Solution :
There are (53 - 32) - 1 = 21 - 1 = 20 whole numbers between 32 and 53.
5. Write the successor of :
(a) 2440701 (b) 100199 (c) 1099999 (d) 2345670
Solution :
(a) 2440701 + 1 = 2440702
(b) 100199 + 1 = 100200
(c) 1099999 + 1 = 1100000
(d) 2345670 + 1 = 2345671
6. Write the predecessor of :
(a) 94 (b) 10000 (c) 208090 (d) 7654321
Solution :
(a) 94 - 1 = 93
(b) 10000 - 1 = 9999
(c) 208090 - 1 = 208089
(d) 7654321 - 1 = 7654320
7. 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
Solution :
(a) Here, 503 lies on the left of 530 on the number line.
∴ 530 > 503 or 503 < 530
(b) Here, 307 lies on the left of 370 on the number line.
∴ 370 > 307 or 307 < 370
(c) Here, 56789 lies on the left of 98765 on the number line.
∴ 98765 > 56789 or 56789 < 98765
(d) Here, 9830415 lies on the left of 10023001
∴ 9830415 < 10023001 or 10023001 > 9830415
8. Which of the following statements are true (T) and which are false (F) ?
(a) Zero is the smallest natural number.
(b) 400 is the predecessor of 399.
(c) Zero is the smallest whole number.
(d) 600 is the successor of 599.
(e) All natural numbers are whole numbers.
(f) All whole numbers are natural numbers.
(g) The predecessor of a two digit number is never a single digit number.
(h) 1 is the smallest whole number.
(i) The natural number 1 has no predecessor.
(j) The whole number 1 has no predecessor.
(k) The whole number 13 lies between 11 and 12.
(l) The whole number 0 has no predecessor.
(m) The successor of a two digit number is always a two digit number.
Solution :
(a) False (b) False (c) True (d) True (e) True (f) False (g) False (h) False (i) True (j) False (k) False (l) True (m) False