Ncert Class 6 Math, Whole Numbers Exercise 2.1

Whole Numbers Class 6 Ex. 2.1

Ncert Class 6 Math Free Solution.

Exercise 2.1

Question 1:- Write the next three natural numbers after 10999.

10,999 + 1 = 11,000
11,000 + 1 = 11,001
11,001 + 1 = 11,002

So, following 10999, the following three natural numbers are 11000, 11001, and 11002.

Question 2 :- Write the three whole numbers occurring just before 10001.

10,001 – 1 = 10,000
10,000 – 1 = 9,999
9,999 – 1 = 9,998

So, the three whole numbers occuring just before 10001 are 10000, 9999 and 9998.

Question 3 :- Which is the smallest whole number?

‘0’ (zero) is the smallest whole number.

Question 4 :- How many whole numbers are there between 32 and 53?

53 – 32 – 1 = 20
From 32 to 53, there are 20 whole numbers.

So, the whole numbers between 32 and 53 are 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52.

Question 5 :- Write the successor of:-

(a) 2440701
(b) 100199
(c) 1099999
(d) 2345670

(a) Successor of 2440701 is 2440701 + 1 = 2440702
(b) Successor of 100199 is 100199 + 1 = 100200
(c) Successor of 1099999 is 1099999 + 1 = 1100000
(d) Successor of 2345670 is 2345670 + 1 = 2345671

Question 6 :- Write the predecessor of:

(a) 94
(b) 10000
(c) 208090
(d) 7654321

(a) The predecessor of 94, 94 – 1 = 93
So, the predecessor of 94 is 93.

(b) The predecessor of 10000, 10000 – 1 = 9,999.
So, the predecessor of 10000 is 9999.

(c) The predecessor of 208090 is 208090 – 1 = 2,08,089
So, the predecessor of 208090 is 2,08,089.

(d) The predecessor of 7654321 is 7654321 – 1 = 76,54,320
So, the predecessor of 7654321 is 76,54,320.

Question 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

We know that the smaller number is always on the left side of the greater number on number line.

(a) 530 > 503;
So, 503 appear on left side of 530 on number line.

(b) 370 > 307;
So, 307 appear on left side of 370 on number line.

(c) 98765 > 56789;
So, 56789 appear on left side of 98765 on number line.

(d) 9830415 < 10023001;
So, 9830415 appear on left side of 10023001 on number line

Question 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.

(a) This statement is false (F)
(b) This statement is false (F)
(c) This statement is true (T)
(d) This statement is true (T)
(e) This statement is true (T)
(f) This statement is false (F)
(g) This statement is false (F)
(h) This statement is false (F)
(i) This statement is true (T)
(J) This statement is false (F)
(k) This statement is false (F)
(l) This statement is true (T)
(m) This statement is false (F).