下列哪一個數是質數?, 37 ✔, 1, 51, 91, 數字 30 的「質因數」有哪些?, 2、3、5 ✔, 1、2、3、5, 2、3、5、6, 1、2、3、5、6、10、15、30, 將 24 寫成質因數連乘積,下列何者正確?, 2 × 2 × 2 × 3 ✔, 4 × 6, 2 × 12, 3 × 8, 下列哪一個是 72 的質因數分解?, 2 × 2 × 2 × 3 × 3 ✔, 8 × 9, 2 × 4 × 9, 2 × 3 × 12, 數字 56 共有幾個「不同的」質因數?, 2 個 ✔, 3 個, 4 個, 1 個, 某數的質因數分解為 2×3×2×5,請問這個數是多少?, 90 ✔, 30, 60, 180, 用短除法對 84 進行質因數分解,結果為:, 22×3×7 ✔, 2×6×7, 4×3×7, 2×2×21, 已知 A=2×2×3×5、B=2×3×5,則 A 和 B 的最大公因數是多少?, 30 ✔, 6, 90, 180, 小萱在做質因數分解時寫出:60=2×3×10,請問哪裡出錯了?, 10 是合數,需要再分解 ✔, 計算乘積不等於 60, 2 和 3 不是質數, 完全正確,沒有錯誤, 一個二位數,它的質因數只有 2 和 7,請問這個數最大是多少?, 98 ✔, 56, 84, 14
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