Divisibility Rules and Factors Flashcards

Grade 6 · Math · Flashcards

Quick-reference divisibility rules and factor vocabulary for Grade 6 math.

Flashcards

Divisible by 2: Last digit is even: 0, 2, 4, 6, or 8
Divisible by 3: Sum of digits is divisible by 3 — e.g. 123: 1+2+3=6 ✓
Divisible by 4: Last two digits form a number divisible by 4 — e.g. 312: 12÷4=3 ✓
Divisible by 5: Last digit is 0 or 5
Divisible by 6: Divisible by BOTH 2 and 3
Divisible by 9: Sum of digits is divisible by 9 — e.g. 729: 7+2+9=18 ✓
Divisible by 10: Last digit is 0
Factor: A whole number that divides another evenly with no remainder
Finding factor pairs: Start at 1 and work up: 1×n, 2×?, 3×?... until factors repeat
Every number's guaranteed factors: 1 and itself — every whole number is divisible by 1 and itself
Is 315 divisible by 9?: Yes — 3+1+5=9, and 9÷9=1 ✓
Is 470 divisible by 6?: No — 470 is divisible by 2 (even) but 4+7+0=11, not divisible by 3