General
A number that can divide other number without leaving any remainder
Factor
Find prime factorization of 36
36 = 2² × 3²
Find HCF of 18 and 30
HCF is 6
Find LCM of 4 and 10
LCM is 20
A carpenter has two types of wooden planks. One is 12 m long and the other is 18 m long. He wants to cut them up so that he has equal size planks to make using them easier. What is the greatest length of the planks can he get if he doesn't want to waste any wood?
6 meters
A number that has only 2 factors 1 and itself
Prime number
Find prime factorization of 63
63 = 3² × 7
Find HCF of 54 and 117
HCF is 9
Find LCM of 15 and 35
LCM is 105
First salesman goes to New York every 15 days and the second salesman every 24 days. Today, both are in New York. After how many days both salesman will be again in New York on same day?
After 120 days
List all factors of 90
90: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
Find prime factorization of 144
144 = 24 × 3²
Find HCF of 12, 20 and 32
HCF is 4
Find LCM of 6, 10 and 15
LCM is 30
Mary baked 30 oatmeal cookies, 36 sugar cookies and 48 chocolate chip cookies to pack in plastic containers for her friends at school. She wants to divide the cookies into identical containers so that each container has the same number of each kind of cookies. If she wants to have the greatest number of gifts possible, how many plastic containers does she need? How many cookies are there in each container in total?
6 containers
19 cookies in each container
Find prime factors of 40
Prime factors of 40 are 2 and 5
Find prime factorization of 350
350 = 2 × 52 × 7
Find HCF of 28, 42 and 70
HCF is 14
Find LCM of 9, 20 and 30
LCM is 180
Trains A, Train B and Train C stops at Swindon at 10:30. Train A stops every 10 minutes, Train B every 14 minutes and Train C every 30 minutes. When do all three trains meet at Swindon again?
At 14:00
In 210 minutes