# NUMBER SYSTEM

Exercise 2 (A)

1.Write down the successor of each of the following numbers :

(i) 3008

(ii) 501300708

2.Write down the predecessor of each of the following numbers :

(i) 84

(ii) 5000

(iii) 3007000

(iv) 506080301

3.How many whole numbers are there between 31 and 517 ?

4.Write the next three consecutive natural numbers :

(i) 98

(ii) 835

5.Write down the next three consecutive natural numbers starting from 3009998.

6.Write down the three whole numbers just preceding 9520001.

7.Tell whether the following groups of numbers represent a set of consecutive numbers or not :

(i) 8,9,10

(ii) 42, 44 ,45, 46

(iii) 61 , 62, 64, 65

(iv) 101, 102 , 103 ,104

8.Write :

(i) Even numbers between 87 and 105.

(ii) Least three even numbers.

(iii) Odd numbers between 120 and 126.

(iv) Greatest 2-digit odd number.

9.In each of the following pairs of numbers state which number is greater :

(i) 74 , 704

(ii) 860 , 806

(iii) 7382 , 7283

(iv) 800139 , 8006139

(v) 2178903 , 1278903

10.Indicate by writing T or F whether each of the following statements is true or false :

(i) The smallest counting number is 0.

(ii) There is a largest natural number.

(iii) Every natural number is a whole number.

(iv) No whole numbers are natural number.

(v) The numeral XXII represents a natural number.

(vi) Zero is a natural number.

(vii) $$\dfrac{1}{2}$$​ is a whole number.

(viii) Zero is the smallest whole number.

(ix) The score in any football game is always given by two natural numbers.

(x) 830 ​$$<$$​ 803

(xi) 8996 ​$$>$$​ 8969

(xii) The successor of 999 is the least 4 digit even number.

(xiii) The predecessor of a two digit number can be a single digit number.

Exercise 2 (B)

1.Read and write down in words the following numbers in Indian system :

(i) 13,057

(ii) 80,483

(iii) 18,00,808

(iv) 12,36,748

(v) 8,30,09,007

(vi) 10,00,30,004

(vii) 1,33,04,05,078

2.Express in figures :

(i) Six lakh three thousand seven hundered eighty-five.

(ii) Eighty lakh fifteen thousand two hundered five.

(iii) Thirty crore seven lakh nine thousand four hundered two.

(iv) One crore one lakh one thousand one.

(v) Five arab seventy crore eighty eigth lakh sixty five thousand two hundered ninety five.

(vi) Ninety two arab eight thousand five.

3.State the place value of 7 in each of the following :

(i) 287

(ii) 7,002

(iii) 73,596

4.Replace each blank with a power of 10 , with 10 or with 1 .

(i) 853 ​$$=$$

(ii) 3,891 $$=$$

(iii) 72,569 $$=$$

5.Express each of the following numbers in expanded form :

(i) 523

(ii) 6,348

(iii) 9,50,842

6.Write the compact numeral :

(a)

(b)

(c)

7.Re-arrange the numbers in each row from the largest to the smallest :

(i) 17,800 ; 17,903 ; 17,308 ; 17,400

(ii) 5,90,672 ; 5,09,762 ; 7,95,072 ; 9,07,652

(iii) 60,0,320 89,79,561 ; 9,00,00,013 ; 9,00,00,031