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Number Theory

Level 5 / foundation

Divisibility intro (2, 3, 5)

3 visual steps / divisibility rule

1. Last digit

divisible? 75 by 51. Last digitlast digit is 5.1last digit is 52rule says yes3answer yes
last digit is 5.

last digit is 5.

2. Rule says yes

divisible? 75 by 52. Rule says yesrule says yes.1last digit is 52rule says yes3answer yes
rule says yes.

rule says yes.

3. Answer yes

divisible? 75 by 53. Answer yesanswer yes. Read answer answer yesanswer yes.
answer yes.

answer yes.

Practice Level 5

Use the visible move, then type only when the answer is clear.

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