ML Aggarwal Class 6 Solutions for ICSE Maths Chapter 2 Whole Numbers Ex 2.1
Question 1.
Write the smallest whole number. Can you write the largest whole number?
Solution:
Smallest whole number = 0
No, we can not write the largest whole number.
Question 2.
Write the successor of each of the following numbers:
(i) 3999
(ii) 378915
(iii) 5001299
Solution:
Successor numbers:
(i) 3999 + 1 = 4000
(ii) 378915+ 1 =378916
(iii) 5001299 + 1 = 5001300
Question 3.
Write the predecessor of each of the following numbers:
(i) 500
(ii) 38794
(iii) 54789011
Solution:
Predecessor numbers :
(i) 500 – 1 = 499
(ii) 38794 – 1 = 38793
(iii) 54789011 – 1 = 54789010
Question 4.
Write the whole number (in each of the following) whose successor is :
(i) 50795
(ii) 720300
(iii) 8300000
Solution:
The required whole number = predecessor of given number:
(i) 50795 – 1 = 50794
(ii) 720300 – 1 = 720299
(iii) 8300000 – 1 = 8299999
Question 5.
Write the whole number (in each of the following) whose predecessor is:
(i) 5347
(ii) 72399
(iii) 3012999
Solution:
The required whole number = successor of given number:
(i) 5347 + 1 = 5348
(ii) 72399 + 1 = 72400
(iii) 3012999 + 1 = 3013000
Question 6.
Write next three consecutive whole numbers of the following numbers:
(i) 79
(ii) 598
(iii) 35669
Solution:
(i) 80, 81, 82
(ii) 599, 600, 601
(iii) 35670, 35671, 35672
Question 7.
Write three consecutive whole numbers occuring just before 320001.
Solution:
The three consecutive whole numbers occuring just before 320001 are:
320001 – 1 = 320000 – 1 =319999 – 1
= 319998
These are : 320000, 319999, 319998
Question 8.
(i) How many whole numbers are there between 38 and 68?
(ii) How many whole numbers are there between 99 and 300?
Solution:
(i) The whole numbers between 38 and 68 are : 39, 40, 41, ………., 67
= 67 – 38 = 29
(ii) The whole numbers between 99 and 300 are: 100, 101, 102, …….., 299
= 299 – 99 = 200
Question 9.
Write all whole numbers between 100 and 200 which do not change if the digits are written in reverse order.
Solution:
The whole numbers between 100 and 200 which do not change if the digits are written in reverse order are:
101, 111, 121, 131, 141, 151, 161, 171, 181, 191
Question 10.
How many 2-digit whole numbers are there between 5 and 92?
Solution:
2-digit numbers between 5 and 92 will be from 10 to 91 i.e. 91 – 9 = 82
Question 11.
How many 3-digit whole numbers are there between 72 and 407?
Solution:
3-digit whole numbers will be from 100 to 406 i. e. 406 – 99 = 307