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33
CHAPTER - 16
Playing with Numbers
Questionscarrying1markeach:-
Q.1 Eachdigitofanumberhasa________value.
Q.2 Write750ingeneralisedform.
Questionscarrying2markseach:
Q.3 Checkthedivisibilityof235by3.
Q.4 Findthevaluesofaandbinthefollowing:
29
+b a
----------
73
----------
Q.5 Writeallnumbersbetween50and60whicharedivisibleby2.
Questionscarrying3markseach:-
Q.6 Findthevalueofa,bandcinthefollowing:-
a1
xc b
------------
306
35 7 x
---------------
38 76
---------------
ISSUED BY KENDRIYA VIDYALAYA - DOWNLOADED FROM WWW.STUDIESTODAY.COM
ISSUED BY KENDRIYA VIDYALAYA - DOWNLOADED FROM WWW.STUDIESTODAY.COM
Page 2


33
CHAPTER - 16
Playing with Numbers
Questionscarrying1markeach:-
Q.1 Eachdigitofanumberhasa________value.
Q.2 Write750ingeneralisedform.
Questionscarrying2markseach:
Q.3 Checkthedivisibilityof235by3.
Q.4 Findthevaluesofaandbinthefollowing:
29
+b a
----------
73
----------
Q.5 Writeallnumbersbetween50and60whicharedivisibleby2.
Questionscarrying3markseach:-
Q.6 Findthevalueofa,bandcinthefollowing:-
a1
xc b
------------
306
35 7 x
---------------
38 76
---------------
ISSUED BY KENDRIYA VIDYALAYA - DOWNLOADED FROM WWW.STUDIESTODAY.COM
ISSUED BY KENDRIYA VIDYALAYA - DOWNLOADED FROM WWW.STUDIESTODAY.COM
34
Q.7 Theunit?sdigitofanumberis7.Findtheremainderwhenitisdividedby2,5
and10.
Q.8 If43x0isamultipleof2,wherexisadigit,whatmightbethevaluesofx?
MultipleChoiceQuestionscarrying1markeach:-
Q.9 In316,theplacevalueof1is
a) 1x10 b) 1x100 c)1x1 d) 1x1000
Q.10 AnumberNisdivisibleby9,ifthesumofitsdigitsisdivisibleby
a) 3 b) 6 c)9 d)Noneof these
ISSUED BY KENDRIYA VIDYALAYA - DOWNLOADED FROM WWW.STUDIESTODAY.COM
ISSUED BY KENDRIYA VIDYALAYA - DOWNLOADED FROM WWW.STUDIESTODAY.COM
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FAQs on Assignment - 1, Playing with Numbers, Maths, Class 8

1. What are the different types of numbers?
Ans. There are several types of numbers, including natural numbers, whole numbers, integers, rational numbers, and irrational numbers. Natural numbers are positive counting numbers, while whole numbers include zero as well. Integers are positive and negative whole numbers, while rational numbers can be expressed as fractions. Irrational numbers, on the other hand, cannot be expressed as fractions and have non-repeating decimal representations.
2. How do you identify prime numbers?
Ans. Prime numbers are numbers that are greater than 1 and can only be divided evenly by 1 and themselves. To identify prime numbers, you can check if the number is divisible by any number between 2 and the square root of the number. If it is not divisible by any of these numbers, then it is a prime number. For example, to check if 11 is prime, you can divide it by 2, 3, 4, 5, and so on until the square root of 11. Since it is not divisible by any of these numbers, 11 is a prime number.
3. What is the difference between rational and irrational numbers?
Ans. Rational numbers can be expressed as fractions, while irrational numbers cannot. Rational numbers can be written in the form of p/q, where p and q are integers and q is not equal to zero. For example, 3/4 and -5/2 are rational numbers. On the other hand, irrational numbers cannot be written as fractions and have non-repeating decimal representations. Examples of irrational numbers include √2, π (pi), and e.
4. How do you add and subtract integers?
Ans. To add or subtract integers, you need to consider their signs. If both numbers have the same sign, you can add or subtract them as you would with whole numbers. For example, (-3) + (-5) = -8 and (-7) - (-2) = -5. If the numbers have different signs, you need to subtract their absolute values and use the sign of the number with the greater absolute value. For example, (-8) + 5 = -3 and (-3) - 7 = -10.
5. What is the difference between whole numbers and natural numbers?
Ans. Natural numbers are positive counting numbers starting from 1, while whole numbers include zero as well. In other words, natural numbers are the set of numbers {1, 2, 3, 4, ...}, while whole numbers are the set of numbers {0, 1, 2, 3, 4, ...}. Therefore, every natural number is a whole number, but not every whole number is a natural number.
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