A number is divisible by 5, if it has ____ or ____ in its ones place.
0 or 5
Divisibility rule for 5 (step by step)
Look only at the ones place (the last digit on the right).
If the ones place is 0 or 5, then the number is divisible by 5.
If the ones place is not 0 or 5, then the number is not divisible by 5.
Examples
30 ends with 0 → divisible by 5.
85 ends with 5 → divisible by 5.
120 ends with 0 → divisible by 5.
Non-examples
42 ends with 2 → not divisible by 5.
67 ends with 7 → not divisible by 5.
Quick checks (small divisions)
\(85 \div 5 = 17\)
\(30 \div 5 = 6\)
\(42 \div 5 = 8\) with remainder \(2\) → not divisible by 5.
Why this works: Multiples of 5 always end in 0 or 5, so any number that ends in 0 or 5 can be made by multiplying 5 by some whole number.