21 P4.WN.JM.17102256
Level 2
The sum of the smallest and greatest factors of 99999 is _______.
2 m
W Addition & subtraction Factors Min-max
22 P4.WN.JM.17102447
Level 3
The sum of Beatrice's age and her younger sister's age is 26. The product of their ages is 144. What is Beatrice's age in 20 years' time?
3 m
Factors Guess & check
23 P4.WN.JM.17102235
Level 3
The sum of all the factors of 20 is the 6th multiple of a number. What is the number?
3 m
Multiples Factors
24 P4.WN.JM.17102233
Level 2
B is a number. It is a factor of 30 and also a multiple of 6. What is/are the possible values of B? Give your answer(s) in numbers. (Eg 1 or 1, 2)
3 m
Multiples Factors
25 P4.WN.JM.17102153
Level 1
What is the largest 5 digit number that has 5 as one of its factors and is less than 100000?
3 m
Factors Min-max More than or less than
26 P6.WN.JC.17010106
Level 1 PSLE
Write down all the common factors of 14 and 18. Give the answer(s) in ascending order. (Eg 1, 2, 3)
1 m
Common factors
27 P5.AP.NK.23012634
Level 3
The figure shows four rectangles Q, R, S and T not drawn to scale. The areas of rectangles Q, R and S are 30 cm22, 40 cm22 and 24 cm22 respectively. What is the area of rectangle T?
4 m
Rectangle Rectilinear figure Factors
28 P4.AP.JM.17100244
Level 3
The figure is made up of 4 rectangles. Find the perimeter of the whole figure.
4 m
Rectangle Rectilinear figure Common factors
29 P4.AP.NK.23050841
Level 3
The figure is made up of 4 rectangles. The lengths and breadths of each rectangle are in whole numbers. Find the area of the shaded rectangle.
4 m
Length Rectangle Rectilinear figure Common factors
30 P3.WN.JM.17110702
Level 2
Two numbers have 8 as their common factor. What are the 2 smallest possible numbers? Give the answers in numbers. (Eg 1, 2)
2 m
Multiples Common factors Min-max
31 P4.WN.NK.22120111
Level 3
The product of two numbers is greater than 80 but less than 85. The sum of the two numbers is a multiple of 5. The difference between the two numbers is 8.
  1. Find the two numbers.
  2. Find the product of the two numbers.
4 m
W 4 operations Factors Multiples More than or less than Systematic Listing
32 P4.WN.JM.17102236
Level 2
An odd number is a multiple of 3 and a factor of 45. The number is greater than 10 but less than 20. What is the number?
4 m
Odd & even Multiples Factors More than or less than
33 P4.WN.JM.17102237
Level 3
Find the possible value(s) of Y in ascending order if Y is a 2-digit odd number that is smaller than 30, a multiple of 3 and also a factor of 45.
4 m
Odd & even Multiples Factors More than or less than
34 P4.WN.NK.23010616
Level 3
I am a 2-digit even number. I am a factor of 72 and also a multiple of 4. What number am I? Write the smallest number.
4 m
Odd & even W Place values W Multiplication & division Multiples Factors Min-max
35 P4.WN.NK.22120110
Level 3
I am a 2 digit even number. I am a factor of 80 and a multiple of 4. However, I am not divisible by 5. What number am I?
4 m
Odd & even W Place values W Multiplication & division Multiples Factors
36 P4.WN.JM.17102234
Level 2
Alice picked two different numbers from a box. One of their common multiples is 24 and the sum of all the factors of the smaller number is 7. The bigger number is 8. What is the smaller number?
4 m
Factors Common multiples
37 P4.WN.JM.17102223
Level 3
Mrs Tan has 24 pupils in her class. She wants them to work in groups for an activity. What is the total number of different ways that she can arrange her pupils, so that each group has the same number of pupils?
4 m
Factors Systematic Listing
38 P4.WN.NK.23010313
Level 3
70 ÷ A = A remainder B
A x B = 48
Find the following values.
  1. A
  2. B
4 m
W Remainder Factors Guess & check
39 P3.WN.JM.17110489
Level 3
A group of 65 pupils decided to form groups of 4 in order to take part in a game.
  1. How many pupils were not involved in the game because they could not belong to a group?
  2. In order for everyone to participate in the game, the 65 pupils decided to increase the number of groups from the existing group arrangement. What is the minimum number of pupils in each group such that everyone would belong to a group?
4 m
W Multiplication & division Factors Remainder min-max
40 P6.WN.JC.17082103
Level 3 PSLE
There are two numbers. One is 5 times the other. They have exactly six common factors. Three of the common factors are 1, 2 and 9.
  1. What are the other 3 common factors?
  2. What are the two numbers?
2 m
Common factors HCF Multiples Times as many

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