Teacher: Tumhare papa 500 rupees loan lete hain. 10% interest ke hisab se voh 1 saal bad loan vapis karte hain..
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Batao kitne paise vapis karenge?
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Child: Kutch bhi nahi.
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Teacher: Tum maths nahi jante..
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Child: Me to maths janta hu, par aap mere papa ko nahi jante