GBA Exam Prep Factors and Multiples Quiz

Fred gained the following marks in his exams.

47 55 42 41 58 63 62 73

Which scores are prime numbers?

• 47, 41, 63, 73

• 47, 58, 62

• 47, 55, 41, 73

• 47, 41, 73

• 42, 58, 62

Which of the numbers below is not a prime number?

• 23

• 53

• 49

• 83

• 67

I have 21 black sheep and 35 white sheep.

I want to divide these sheep up into groups of equal size but the sheep in each group must all be the same colour.

What is the largest number of sheep that can be in each group?

What is the first four digit multiple of 21?

• 1001

• 1004

• 1008

• 1012

• 1020

30 cards need to be split into a number of piles of equal size. The number of cards in each pile has to be a prime number.

What is the largest number of cards that can be in each pile?

What is the biggest number that divides exactly into 16, 32 and 56?

I start with a number, add 6 to it and divide it by 5. I end up with the smallest prime number so what number must I have started with?

What is the highest common factor of 95 and 117?

• 5

• 13

• 1

• 3

• 19

Look at this list of numbers.

What is the product of the smallest cube number

and the lowest common multiple of the two smallest odd numbers?

Ginny circles every multiple of 13 less than 500.

She then crosses every multiple of 17 less than 500.

How many numbers get both ringed and crossed?

• 10

• 0

• 1

• 2

• 4