State board numericals do aim for whole numbers, but I've seen decimal ones too in practice papers. For entrance exams, they rarely simplify neatly—JEE loves messy roots and ratios. My approximation trick? Use round-off for π as 3 or √2 as 1.4, but only for checking steps, not the final answer. I learned this during my coaching in Hyderabad, solving hundreds of problems under time pressure without a calculator—it trains your instinct for which decimals to keep.
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