Question
The number of prime numbers between 445 and 456 is:
Asked in RRB Group D · 2026
Prime Numbers · Quantitative Aptitude
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To test whether n is prime, checking divisibility by primes up to √n is sufficient.
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Questions Asked from Prime Numbers: Testing & Finding Primes Fast in Previous Exams
See how often Prime Numbers: Testing & Finding Primes Fast has appeared in previous-year questions across major government exams.
14UPSC Questions Asked in These Years:2011, 2012, 2013, 2014, 2015, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2026
10SSC Questions Asked in These Years:2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
8Railways Questions Asked in These Years:2016, 2018, 2020, 2021, 2022, 2024, 2025, 2026
14State PSC Questions Asked in These Years:2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
Prime Numbers: Testing & Finding Primes Fast has appeared in 46 previous-year exam questions, most frequently in UPSC, State PSC and SSC.
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