maths急!maths急!maths急!THANKS!
x+1 can÷2
x+2 can÷3
x+3 can÷4
x+4 can÷5
x+5 can÷6
x can÷7
find the smallest number of x, thamks !
回答 (2)
x+1 can÷2
x+2 can÷3
x+3 can÷4
x+4 can÷5
x+5 can÷6
x can÷7
find the smallest number of x, thanks! A. x+4 can be divided by 4, the last digit of x = 1 or 6 x+1 can be divided by 2, x is odd numberSo, the last digit of x = 1 21: 21+2 can’t be divided by 391: 91+3 can’t be divided by 4161: 161+2 can’t be divided by 3231: 231+2 can’t be divided by 3 301: 301+1 can be divided by 2301+2 can be divided by 3301+3 can be divided by 4301+4 can be divided by 5301+5 can be divided by 6301 can be divided by 7 So, the smallest number of x is 301.
參考: Me
x+1 can÷2
x+2 can÷3
x+3 can÷4
x+4 can÷5
x+5 can÷6
x can÷7
find the smallest number of x, thanks! A. x+4 can be divided by 4, the last digit of x = 1 or 6x+1 can be divided by 2, x is odd numberSo, the last digit of x = 1 21: 21+2 can’t be divided by 391: 91+3 can’t be divided by 4161: 161+2 can’t be divided by 3231: 231+2 can’t be divided by 3 301: 301+1 can be divided by 2301+2 can be divided by 3301+3 can be divided by 4301+4 can be divided by 5301+5 can be divided by 6301 can be divided by 7 So, the smallest number of x is 301.
參考: Myself
收錄日期: 2021-04-13 17:47:54
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