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Write three pairs of prime numbers less than 20 whose sum is a multiple of 5

Important Questions on Prime Time

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Ganita Prakash Grade 6 Mathematics Textbook>Chapter 5 - Prime Time>Q 26
The numbers 13 and 31 are prime numbers. Both these numbers have same digits 1 and 3. Find such pairs of prime numbers up to 100.
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6th CBSE Latest Syllabus
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Ganita Prakash Grade 6 Mathematics Textbook>Chapter 5 - Prime Time>Q 27
Find seven consecutive composite numbers between 1 and 100.
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Ganita Prakash Grade 6 Mathematics Textbook>Chapter 5 - Prime Time>Q 28
Twin primes are pairs of primes having a difference of 2. For example, 3 and 5 are twin primes. So are 17 and 19. Find the other twin primes between 1 and 100.
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Ganita Prakash Grade 6 Mathematics Textbook>Chapter 5 - Prime Time>Q 30
Which of the following numbers is the product of exactly three distinct prime numbers: 45,60,91,105,330?
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Ganita Prakash Grade 6 Mathematics Textbook>Chapter 5 - Prime Time>Q 31
How many three-digit prime numbers can you make using each of 2,4 and 5 once?
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Ganita Prakash Grade 6 Mathematics Textbook>Chapter 5 - Prime Time>Q 32
Observe that 3 is a prime number, and 2×3+1=7 is also a prime. Are there other primes for which doubling and adding 1 gives another prime? Find at least five such examples.
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Ganita Prakash Grade 6 Mathematics Textbook>Chapter 5 - Prime Time>Q 33
Identify whether18 and 35 are co-prime?
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6th CBSE Latest Syllabus
IMPORTANT
Ganita Prakash Grade 6 Mathematics Textbook>Chapter 5 - Prime Time>Q 34
Identify whether15 and 37 are co-prime?