Question Bank: Prime Time

Which of the following is a common multiple of 3 and 5?

What do players say for the number 9 in the Idli-Vada game?

Identify a common factor of 12 and 18.

Which of the following numbers is NOT a common multiple of 3?

What will the players say for the number 30?

Which number is the least common multiple (LCM) of 4 and 5?

How many common multiples do the numbers 2 and 3 have below 20?

Which pair of numbers has the highest common factor (HCF) of 1?

What is the 10th common multiple of 7?

What should players say when the number 45 is called?

Which of the following numbers is a common factor of 24 and 36?

What is the least common multiple (LCM) of 6 and 8?

How can you identify a number as a common multiple of 4 and 6?

Which of the following pairs of numbers has a common multiple of 15?

For which of these pairs of numbers is 1 the only common factor?

Identify the multiples of 4 that are less than 20.

Which of the following pairs of numbers are co-prime?

Which of the following pairs is NOT co-prime?

Select the pair of numbers that are co-prime.

What is the first number greater than 1 that is co-prime with 14?

Which pair includes a co-prime with 15?

Identify the co-prime number for 16.

If two numbers are co-prime, which of the following must be true?

Which of these pairs of numbers can NEVER be co-prime?

Which two numbers are co-prime?

Choose the combination that consists of co-prime numbers.

Which of these numbers is co-prime with 9?

What pairs of numbers are co-prime?

Which statement about co-prime numbers is true?

What pair contains co-prime numbers?

Which of the following numbers is a prime number?

Which of these is NOT a prime number?

What is the smallest prime number?

Which of the following pairs contains only prime numbers?

What is the sum of the first three prime numbers?

Which of these numbers is a prime factor of 28?

Which of the following numbers has exactly three factors?

If you multiply any two prime numbers, what will the result be?

Which of the following is the next prime number after 29?

Which of the following numbers is both a prime and even?

Identify the prime number among the following options:

Which of the following statements is true?

If a number ends in a 0 or 5, which can be a prime number?

Determine the prime numbers between 10 and 30.

Find the prime factorization of 30.

Which number can be classified as a twin prime with 31?

What should a player say when it's their turn to say '6'?

Which of the following numbers requires a player to say 'vada'?

What should the player say for the number '15'?

Which number is the first common multiple of 3 and 5?

If the game continues up to number '30', which number needs to be replaced with 'idli'?

For which of the following should the player say 'idli-vada'?

Which of the following statements is true?

If a player mistakenly says '12' instead of 'idli', what will happen?

Which number among these is not a multiple of 3?

What should a player say for '21'?

If someone has to say '40', what will they say?

What is the next multiple of 3 after 27?

If a player needs to say '45', what do they say?

Which number is a common multiple of 3 and 5?

For the number 90, what should a player say?

What should you replace '18' with?

What is the prime factorisation of 12?

Which number has only one prime factor?

What is the prime factorisation of 30?

How many prime factors does the number 18 have?

Which of the following is a prime number?

What is the prime factorisation of 49?

If a number has a prime factorisation of 2 x 2 x 3 x 5, what is the number?

Which of the following numbers is NOT a composite number?

What is the prime factorisation of 60?

What is the least common multiple of 3 and 5 using their prime factorisation?

Which number is both a prime and a factor of 14?

How would you express 36 in terms of its prime factors?

What is the prime factorisation of 100?

Equate 15 to its prime factors and identify its components.

Identify the prime factorisation of 81.

Which of the following numbers is a multiple of 3?

What will a player say when their turn is the number 12 in the game?

What is the first common multiple of 3 and 5?

Which number should be said 'vada' in the game?

How many numbers below 30 are multiples of both 3 and 5?

Which of the following is NOT a multiple of 3?

What will players say for number 30 in the game?

Which is true about multiples of 5?

What will players say for the number 45 in the game?

What is 60 divided by 3?

Which number must be said as 'idli'?

What is the next multiple of 5 after 15?

If a player mistakenly says 'vada' for the number 3, what will happen?

Which number is a common multiple of 3 and 5?

Which of the following is a multiple of 10?

How many multiples of 5 are there between 1 and 50?