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HCF of two numbers is always a factor...

HCF of two numbers is always a factor of their LCM (True/false).

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Write 'T' for true and 'F' for false statement . (i) Every prime number is odd. (ii) Every even number is composite (iii) The sum of two odd numbers is always odd. (iv) The sum of two even numbers is always even. (v) The HCF of two given numbers is always a factor of their LCM .

The sum of two prime numbers is always a prime number (True/false).

The H.C.F. of two numbers is 23 and the other two factors of their L.C.M. are 13 and 17. Find the larger of the two numbers.

The HCF of two numbers is 4 and the two factors of LCM are 5 and 7 . Find the smaller of the two numbers . A.10. B.14 C. 20 . D.28

Two numbers have 12 as their HCF and 350 as their LCM (True/false).

The HCF of two number is 4 and the two other factors of LCM are 5 and 7. Find the smaller of the two numbers.

The LCM of two numbers is 28 times of their HCF. The sum of their LCM and HCF is 1740. If one of the numbers is 240, find the other number.

If the HCF of two numbers is one of the numbers, then their LCM is the other number.

RD SHARMA-REAL NUMBERS-All Questions
  1. What is a composite number?

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  2. What is the HCF of the smallest composite number and the smallest p...

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  3. HCF of two numbers is always a factor of their LCM (True/false).

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  4. pi is an irrational number (True/false).

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  5. The sum of two prime numbers is always a prime number (True/false).

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  6. The product of any three consecutive natural numbers is divisible b...

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  7. Every even integer is of the form 2m , where m is an integer (True/...

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  8. Every odd integer is of the form 2m-1 , where m is an integer (True...

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  9. The product of two irrational numbers is an irrational number (True...

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  10. The sum of two irrational numbers is an irrational number (True/fal...

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  11. For what value of n ,\ 2^nxx5^n ends in 5.

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  12. If a and b are relatively prime numbers, then what is their HCF?

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  13. If a and b are relatively prime numbers, then what is their LCM?

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  14. Two numbers have 12 as their HCF and 350 as their LCM (True/false).

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  15. The exponent of 2 in the prime factorisation of 144, is (a) 4        ...

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  16. The LCM of two numbers is 1200. Which of the following cannot be th...

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  17. If n=2^3xx3^4xx5^4xx7 , then the number of consecutive zeros in n ,...

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  18. The sum of the exponents of the prime factors in the prime factoris...

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  19. The number of decimal places after which the decimal expansion of t...

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  20. If two positive integers a and b are expressible in the form a=p...

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