${[['2','Last digit is even (0,2,4,6,8)'],['3','Sum of digits divisible by 3'],['4','Last 2 digits divisible by 4'],['5','Last digit is 0 or 5'],['6','Divisible by both 2 and 3'],['7','Double last digit, subtract from rest; repeat'],['8','Last 3 digits divisible by 8'],['9','Sum of digits divisible by 9'],['10','Last digit is 0'],['11','Alternating digit sum divisible by 11']].map(([d,r])=>`
÷${d} ${r}
`).join('')}