Divisibility rules
Divisibility rules are math shortcuts. They tell you quickly if one number can divide another with no remainder.
Do this: Read the concept below, then try the quiz or activity.
Concept
Use these quick tests:
š¢ Divisible by 2: number ends in 0, 2, 4, 6, or 8 š¢ Divisible by 3: sum of digits is divisible by 3 š¢ Divisible by 4: last two digits form a number divisible by 4 š¢ Divisible by 5: number ends in 0 or 5 š¢ Divisible by 6: divisible by both 2 and 3 š¢ Divisible by 9: sum of digits is divisible by 9 š¢ Divisible by 10: number ends in 0
Example: 1,458 - by 2? yes (ends in 8) - by 3? yes (1+4+5+8 = 18) - by 6? yes (passes 2 and 3) - by 9? yes (18 is divisible by 9)
Try it
Use divisibility rules.
1. Is 624 divisible by 2, 3, 4, 6, and 9? 2. Is 935 divisible by 5 and 10? 3. Is 2,124 divisible by 3 and 6? 4. Is 1,118 divisible by 4? 5. Find all numbers from 30 to 60 that are divisible by both 2 and 3.
šÆ Challenge: 6. Create a 4-digit number divisible by 2, 3, 5, and 10.