# S Chand ICSE Mathematics Class 6 Solution First Chapter Numbers Exercise 1A (O.P. Malhotra,  S.K. Gupta, Anubhuti Gangal)

## Exercise 1A

(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