9321 = 3 x 13 x 239 = 31 x 13 1 x 239 1 ; add one to all the powers ie.,
(1+1) x (1+1) x (1+1)= 8 ;
we get eight factors.
Here if you observe, add and subtract are opposite in nature. Similarly, mutiply and divide are also opposite in nature.
Hence, Add : Multiply :: Subtract : Divide.
We park car temporarily in garrage, similarly, aeroplane is temporarily parked in hangar.
Ration synonyms are allowance, consignment, quota,...
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