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Khulna Higher Secondary 2017#1

Posted: Sat Feb 24, 2018 1:36 am
by samiul_samin
Bindu and Shad ate commander, who like to arrange their troop in such a way that the number of troops in row and column remain same.Bindu has $4$ troops per row in his army and Shad has $5$ troops per column in his army.How much additiona troops they need if they want to arrange their army together?

Re: Khulna Higher Secondary 2017#1

Posted: Sat Feb 24, 2018 1:36 am
by samiul_samin
Hint
Use square number
Answer
$8$