Questions and Answers
The HCF of 26 and 191 is ……………..number
prime
Product of two consecutive integers is always divisible by…………………
2
If a=9, b=12 then HCF(a,b) × LCM(a,b ) = ……..
108
Product of HCF and LCM of two numbers=……………
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Ie`k …… sMiKAw hY[
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HCF of 39 and 91 is: (a) 15 (b) ______ (c) 19 (d) 11
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If p and q are integers and is represented in the form of p/q,where q≠0 then the number is a: (a) pUrn sMiKAw/ Whole number (b) pirmyX sMiKAw/ ______ (c)pRikriqk sMiKAw/ Natural number (d) ApirmyX sMiKAw / Irrational number
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The product of two different irrational numbers is always: (a) vwsqivk sMiKAw / rational number (b) Avwsqivk sMiKAw / irrational number (c) pRikriqk sMiKAw/ Natural number (d) auprokਤ iv`coN koeI nhIN / none of above
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The HCF of two coprime numbers is always: (a) 0 (b) ______ (c) 2 (d) greater than 2
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Which number is the sum of rational and irrational number excluding zero ?(a) pUrn sMiKAw / Whole number (b) pirmyX sMiKAw / Rational number (c)pRikriqk sMiKAw / Natural number (d) ਅpirmyX sMiKAw/ irrational number
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Study Notes
Properties of HCF and LCM
- The product of HCF and LCM of two numbers is always equal to the product of the numbers.
- HCF(a, b) × LCM(a, b) = ab, where a and b are two numbers.
HCF of Numbers
- The HCF of 26 and 191 is 1.
- The HCF of 39 and 91 is 13.
Properties of Integers
- The product of two consecutive integers is always divisible by 2.
Types of Numbers
- A number of the form p/q, where q ≠ 0, is a rational number.
- A rational number is not a whole number.
- The product of two different irrational numbers is not always rational.
- The sum of a rational and an irrational number (excluding zero) is an irrational number.
Properties of Coprime Numbers
- The HCF of two coprime numbers is always 1.
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