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10th CBSE
IMPORTANT
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HCF of two numbers is always a factor of their LCM.

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Important Questions on Real Numbers

EASY
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 1 - Real Numbers>FOR ASSESSMENT>Q 1
If a number can't be expressed in the form ab where a and b are integers and b≠0, then it is known as _____ number.
EASY
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 1 - Real Numbers>FOR ASSESSMENT>Q 4
H.C.F. of two or more prime numbers is always _____.
EASY
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 1 - Real Numbers>FOR ASSESSMENT>Q 5
LCM of two or more _____ numbers is equal to their product. (composite/prime/irrational/negative)
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10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 1 - Real Numbers>FOR ASSESSMENT>Q 7
If the product of two coprime numbers is 553, then their LCM = _____
EASY
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 1 - Real Numbers>FOR ASSESSMENT>Q 8

The value of x in following factor tree is _____

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EASY
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 1 - Real Numbers>FOR ASSESSMENT>Q 9
Sum of a rational and irrational number is never _____ number.
EASY
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 1 - Real Numbers>FOR ASSESSMENT>Q 10
The product of any irrational number with a rational number x is always rational. Then, the value of x is _____.
MEDIUM
10th CBSE
IMPORTANT
Modern's abc+ of Mathematics for Class 10>Chapter 1 - Real Numbers>FOR ASSESSMENT>Q 11
If p is a prime number, then p is always an _____