public boolean nearBase(int num, int base, int deviation) {

        // ..TODO check guards, normalize input or throw exceptions
        // - base and deviation are expected strict positive integers
        // - deviation is expected smaller than base
        // - num is expected a positive integer

        var congruent = num % base;
        var inverted = base - congruent;
        var distance = Math.min(congruent, inverted);
        return distance <= deviation;
    }

 // your method rewritten ->
 public boolean nearTen(int num) {
        return nearBase(num, 10, 2);
    }

7 % 10 = 7
8 % 10 = 8
9 % 10 = 9
10 % 10 = 0
11 % 10 = 1
12 % 10 = 2
13 % 10 = 3

public boolean nearTen(int num) {
    int modulo = num % 10;
    return modulo <= 2;
}

public boolean nearTen(int num) {
    int modulo = num % 10;
    return modulo <= 2 || num - modulo <= 2;
}