(i) 1, 100

As it contains only single term it is simply a like term

(ii) -7x,

As both term have same algebraic factor as x, the terms are like.

(iii) -29x, -29y

As both term don’t have same algebraic factor (As -29x has x and -29 has y), the terms are unlike.

(iv) 14xy, 42yx

As both term have same algebraic factors as x and y, the terms are like.

(v) 4m²p, 4mp²

As term 4m²p has factors m, m and p but term 4mp² has factors m, p and p. so both terms are unlike

(vi) 12xz, 12x²z²

As term 12xz has factors x and z but term 12x²y² has factors x, x, y and y. so both terms are unlike.