Question

Who is the odd-one-out ?
(1) Diesel, crude oil, natural gas, wind
(2) A running car, hauling a log, a book kept on a table, picking up the school bag.
(3) Sunlight, wind, waves, petrol
(4) Leaving the fan on in a vacant room, leaving the TV on while working, using AC during winter, putting off the light when going out.

Answer 1

(1) Wind is the odd one out as it is a non-conventional energy resource. The rest are conventional energy resource.

(2) A book kept on a table is the odd one out as no work is being done in this case. In rest of the cases, work is being done.

(3) Petrol is the odd one out as it is a conventional energy resource. The rest are non-conventional energy resource.

(4) Putting off the light when going out is the odd one out as it is one of the measures of saving energy. The rest involves wastage of energy.