Question

Find the odd-man-out:

(a) cm, kg, dm, hm.

(b) step, scale, handful, span.

(c) metre, kilogram, gram, second.

(d) metre, centimetre, gram, second.

Answer 1

(a) kg

cm, dm, hm are units of length but kg is unit of mass.

(b) scale

Using a footstep, handful, span for measurement are known as non-standard methods of measurement but using a scale for measurement is a standard method of measurement.

(c) gram

Metre, kilogram, second are the units from M.K.S. system but gram is a unit of C.G.S system.

(d) metre

Centimetre, gram and second are units from C.G.S. system but metre is a unit of M.K.S system.