S Chand ICSE Mathematics Class 6 Solution First Chapter Numbers Exercise 1A (O.P. Malhotra, S.K. Gupta, Anubhuti Gangal)
Exercise 1A
(1) Answer the following questions.
(i) The counting numbers are also called
Ans:- Natural Numbers
(ii) The largest digit used in the Hindu-Arabic number system is
Ans:- 9
(iii) In the number 666743, 4 stands for 4 ones. True or False.
Ans:- False
(iv) The predecessor of a numbers is obtained by
Ans:- Subtracting 1
(v) The successor of 9999 is 1000. True or False
Ans:- False
(2) Write the following numbers in numerals.
(i) 2050
Ans:- Two thousand fifty
(ii) 40023
Ans:- Forty thousand twenty three
(iii) 29001
Ans:- Twenty nine thousand one
(iv) 80203
Ans:- Eighty thousand two hundred three
(v) 73506
Ans:- Seventy three thousand five hundred six
(3) Write the following numbers in numerals.
(i) Four thousand four hundred forty-four.
Ans:- 4444
(ii) Sixty-four thousand eight.
Ans:- 64008
(iii) Nineteen thousand four hundred fifty-seven.
Ans:- 19457
(iv) Seventy thousand four hundred three.
Ans:- 70403
(v) Ninety thousand eight.
Ans:- 90008
(4) Fill in the blanks with < or > sign.
(i) 34512___ 5451
Ans:- >
(ii) 63458____63548
Ans:- <
(iii) 96785____95793
Ans:- >
(iv) 58934____58943
Ans:- <
(v) 9413____24007
Ans:- <
(vi) 40017____40007
Ans:- >
(5) Arrange the fol9lowing numbers in ascending order.
(i) 31586, 35816, 3581, 368419
Ans:- 3581, 31586, 35816, 36819
(ii) 29435, 43592, 29463, 54396
Ans:- 29435, 29463, 43592, 54396
(iii) 12345, 42315, 23145, 13425
Ans:- 12345, 13425, 23145, 42315
(6) Arrange the following numbers in descending order.
(i) 6234, 6314, 6432, 632
Ans:- 6432, 6324, 6234, 632
(ii) 90403, 90304, 90406, 90046
Ans:- 90406, 90403, 90304, 90046
(iii) 82416, 84126, 82641
Ans:- 86142, 84126, 82641, 82416
(7) Write the successor of :
(i) 197
Ans:- 197 + 1 = 198
(ii) 1358
Ans:- 1358 + 1 = 1359
(iii) 10889
Ans:- 10889 + 1 = 10890
(iv) 79999
Ans:- 79999 + 1 = 80000
(8) Write the predecessor of:
(i) 80
Ans:- 80 – 1 =79
(ii) 7890
Ans:- 7890 – 1 = 7889
(iii) 13586
Ans:- 13586 – 1 = 13585
(iv) 10000
Ans:- 10000 – 1 = 9999
Multiple Choice Questions (MCQs)
(9) The number “fifty-nine thousand nine hundred eighty-six” in numerals is
(a) 59896 (b) 58996 (c) 59986 (d) 5996
Ans:- (c) 59986
(10) Which of the following set of numbers is arranged in ascending order?
(a) 10006, 10600, 16000, 10060
(b) 10600, 10006, 10060, 16000
(c) 10006, 10060, 16000, 10600
(d) 10006, 10060, 10600, 16000
Ans:- (d) 10006, 10060, 10600, 16000
(11) The sum of the successor and predecessor of 100 is
(a) 101 (b) 199 (c) 200 (d) 111
Ans:- (c) 200
(12) In the number 43256, the digit 3 stands for
(a) 3 hundreds
(b) 3 ten thousands
(c) 3 thousands
(d) 3 tens
Ans:- (c) 3 thousands
Challenge!
(13) I am a five digit number. My ones digit is 3. My hundreds digit is 2 times my ones digit. My tens digit is the sum of ones digit and hundreds digit. My thousands and ten thousands digit is one less than hundreds digit.
(i) What number am I?
Ans:- 55693
(ii) Write my successor.
Ans:- 55694
(iii) Am I greater than or less than the number, “fifty-five thousand nine hundred thirty-six”?
Ans:- Less than
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