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SW-User
Take any number, add up its digits. If the sum is divisible by 3, so is the original number.
Same with 9.
If the last two digits of a number are divisible by 4, the original is as well.
If a number has 2 and 4 as factors, 8 is also a factor.
If a number has both 2 and 3 as factors, 6 is also a factor.
Numbers ending in 0 are divisible by 5 and 10.
Numbers ending in 5 are divisible by 5.
Tips and tricks for ACT/SAT prep.
Same with 9.
If the last two digits of a number are divisible by 4, the original is as well.
If a number has 2 and 4 as factors, 8 is also a factor.
If a number has both 2 and 3 as factors, 6 is also a factor.
Numbers ending in 0 are divisible by 5 and 10.
Numbers ending in 5 are divisible by 5.
Tips and tricks for ACT/SAT prep.