EASY
Upper Secondary: IGCSE
IMPORTANT
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Write the total number of odd prime numbers less than 50 ?

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Important Questions on Reviewing Number Concepts

EASY
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Mathematics Core and Extended Coursebook Second Edition>Chapter 1 - Reviewing Number Concepts>Exercise 1.7>Q 3
Write all the composite numbers greater than four , but less than 30.
EASY
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Mathematics Core and Extended Coursebook Second Edition>Chapter 1 - Reviewing Number Concepts>Exercise 1.7>Q 4
Twin primes are pairs of prime numbers that differ by two. Write all twin prime pairs up to 100.
EASY
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Mathematics Core and Extended Coursebook Second Edition>Chapter 1 - Reviewing Number Concepts>Exercise 1.7>Q 5
Is 149 a prime number ? Explain
EASY
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Mathematics Core and Extended Coursebook Second Edition>Chapter 1 - Reviewing Number Concepts>Exercise 1.7>Q 6
Find two three-digit super-prime numbers less than 400.
EASY
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Mathematics Core and Extended Coursebook Second Edition>Chapter 1 - Reviewing Number Concepts>Exercise 1.7>Q 6
Find a four-digit super-prime numbers less than 3000.
EASY
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Mathematics Core and Extended Coursebook Second Edition>Chapter 1 - Reviewing Number Concepts>Exercise 1.7>Q 6
Sondra's telephone number is the prime number 987-6413. Is her phone number a super-prime?
EASY
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Mathematics Core and Extended Coursebook Second Edition>Chapter 1 - Reviewing Number Concepts>Exercise 1.8>Q 1

Express the following number as the product of prime factors.

30

EASY
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Mathematics Core and Extended Coursebook Second Edition>Chapter 1 - Reviewing Number Concepts>Exercise 1.8>Q 1

Express the following number as the product of prime factors.

24