# 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