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Sequences and Series question

2013 · Shift 1 · Q22
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Sequences and Series question

2013 · Shift 1 · Q22

JEE AdvancedMathematicsSequences and SeriesNumerical+4 / −1
A pack contains nnn cards numbered from 111 to n.n.n. Two consecutive numbered cards are removed from the pack and the sum of the numbers on the remaining cards is 1224.1224.1224. If the smaller of the numbers on the removed cards is k,k,k, then k−20=k-20=k−20=
Numerical answer
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