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RD SHARMA-PLAYING WITH NUMBERS-All Questions
- A number is divisible by both 5 and 12. By which other number will ...
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- Find the common factors of: (i)15 and 25 (ii) 35 and 50
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- Find the common factors of: 5, 15 and 25 (ii) 2, 6 and 8
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- Find first three common multiples of 6 and 8.
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- Find first two common multiples of 12 and 18.
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- A number is divisible by both 5 and 12. By which other number will th...
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- A number is divisible by 24. By what other numbers will that number b...
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- Which of the following numbers are prime numbers: 179 (...
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- What are prime numbers? List all primes between 1 and 30.
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- Write all prime numbers between: (i) 70 and 90 (ii) 40 and 85
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- What is the smallest prime number? Is it an even number?
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- What is the smallest odd prime? Is every odd number a prime number?...
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- What are composite numbers? Can a composite number be odd? If yes, ...
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- What are the twin-primes? Write all pairs of twin prime between 1 and ...
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- What are co-primes? Give examples of five pairs of co-primes. Are co...
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- Which of the following pairs are always co-primes? (i)two p...
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- Express each of the following as a sum of two or more primes: 13 ...
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- Express each of the following numbers as the sum of two odd primes:...
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- Express each of the following numbers as the sum of twin primes: 36...
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- Find the possible missing twins for the following numbers so that t...
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