Multiples and Factors
HCF and LCM
Directions
Arithmetic Operations
Perimeter
1
For numbers up to 100, there are ____ prime numbers.
25
1
List all the common factors of 24 and 64.
1,2,4,8
1
Ada faces northwest, ________ is behind her.
Southeast
1
825 ÷ 33 x 8
200
1
The length of a side of a square is 30 cm. What is its perimeter in cm?
30 x 4 = 120 cm
2
What is the difference between the 21st multiple and the 24th multiple of 15?
45
2
HCF of 28 and 98
14
2
Abby faces southwest. After turning left by two right angles, she faces ___________.
northeast
2
16 ÷ 20 x 5
4
2
Billy is running around a square runway. After 5 laps, he has run 400 m. What is the perimeter of the runway in m?
400 ÷ 5 = 80 m
3
List all the prime numbers between 40 and 60.
41,43,47,53,57,59
3
LCM of 6,9,15
90
3
South
3
80 ÷ 5 - 4 x 4
0
3
The length of a rectangle is 12 m long. Its length is 3 times its width. What is its perimeter?
( 12 + 4) x 2=32 m
4
What is the sum of the smallest and the greatest multiples of 14 between 40 and 130?
42 + 126 =168
4
The product of which of the following groups of numbers is their LCM?
A. 7,9
B. 10,15
C. 6,21
D. 7,42
A
4
food kiosk, south
4
72 - 9 x 4 ÷ (5 + 7)
69
4
A rectangular dining table has a length of 3 m and a perimeter of 10 m. What is the width of the dining table in m?
10 ÷ 2 - 3 = 2m
5
The third multiple of K is 72. What is the second multiple of K?
72 / 3 x 2
5
The greatest factor of a number is 25. What is the third common multiple of this number and 8?
600
5
Derrick walks 500 m northwest from his school and then walks 500 m southwest to reach the bus station. The bus station is in which direction of the school?
West
5
( 144 + 63 ) ÷ (10 - 7) x 5
345
5
The perimeter of a rectangle is 24 cm. The length is 2 times of the width. What is its width?
24 ÷ 2 ÷ 3 = 4 cm