Enhance Your Learning with Divisibility Rules Flash Cards for quick math skills improvement
A number is divisible by 2 if it is even, meaning it ends in 0, 2, 4, 6, or 8.
A number is divisible by 3 if the sum of its digits is divisible by 3.
A number is divisible by 4 if the last two digits form a number divisible by 4.
A number is divisible by 5 if it ends in 0 or 5.
A number is divisible by 6 if it is divisible by both 2 and 3.
A number is divisible by 7 if the difference between twice the last digit and the remaining digits is divisible by 7.
A number is divisible by 8 if the last three digits form a number divisible by 8.
A number is divisible by 9 if the sum of its digits is divisible by 9.
A number is divisible by 10 if it ends in 0.
A number is divisible by 11 if the difference between the sum of the digits in odd positions and the sum of the digits in even positions is divisible by 11.
A number is divisible by 12 if it is divisible by both 3 and 4.
A number is divisible by 13 if the difference between four times the last digit and the remaining digits is divisible by 13.
A number is divisible by 14 if it is divisible by both 2 and 7.
A number is divisible by 15 if it is divisible by both 3 and 5.
A number is divisible by 16 if the last four digits form a number divisible by 16.
A number is divisible by 17 if the difference between five times the last digit and the remaining digits is divisible by 17.
A number is divisible by 18 if it is divisible by both 2 and 9.
A number is divisible by 19 if the difference between two times the last digit and the remaining digits is divisible by 19.
A number is divisible by 20 if it is divisible by both 4 and 5.
A number is divisible by 21 if it is divisible by both 3 and 7.
A number is divisible by 22 if it is divisible by both 2 and 11.
A number is divisible by 23 if the difference between seven times the last digit and the remaining digits is divisible by 23.
A number is divisible by 24 if it is divisible by both 3 and 8.
A number is divisible by 25 if it ends in 00, 25, 50, or 75.
A number is divisible by 26 if it is divisible by both 2 and 13.
A number is divisible by 27 if it is divisible by both 3 and 9.
A number is divisible by 28 if it is divisible by both 4 and 7.
A number is divisible by 29 if the difference between three times the last digit and the remaining digits is divisible by 29.
A number is divisible by 30 if it is divisible by both 2, 3, and 5.
A number is divisible by 31 if the difference between six times the last digit and the remaining digits is divisible by 31.
A number is divisible by 32 if the last five digits form a number divisible by 32.
A number is divisible by 33 if it is divisible by both 3 and 11.
A number is divisible by 34 if it is divisible by both 2 and 17.
A number is divisible by 35 if it is divisible by both 5 and 7.
A number is divisible by 36 if it is divisible by both 4 and 9.
A number is divisible by 37 if the difference between eight times the last digit and the remaining digits is divisible by 37.
A number is divisible by 38 if it is divisible by both 2 and 19.
A number is divisible by 39 if it is divisible by both 3 and 13.
A number is divisible by 40 if it is divisible by both 4 and 10.
A number is divisible by 41 if the difference between nine times the last digit and the remaining digits is divisible by 41.
A number is divisible by 42 if it is divisible by both 2, 3, and 7.
A number is divisible by 43 if the difference between ten times the last digit and the remaining digits is divisible by 43.
A number is divisible by 44 if it is divisible by both 4 and 11.
A number is divisible by 45 if it is divisible by both 3 and 15.