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Number Theory

Level 7 / foundation

Divisibility (3-9)

3 visual steps / divisibility rule

1. Known multiple

divisible? 168 by 71. Known multiple7 x 24 = 168.17 x 24 = 1682exact multiple3answer yes
7 x 24 = 168.

7 x 24 = 168.

2. Exact multiple

divisible? 168 by 72. Exact multipleexact multiple.17 x 24 = 1682exact multiple3answer yes
exact multiple.

exact multiple.

3. Answer yes

divisible? 168 by 73. Answer yesanswer yes. Read answer answer yesanswer yes.
answer yes.

answer yes.

Practice Level 7

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

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