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Simple interest for 4 years = 13100 – 9500 = 3600 Simple interest for 1 year = 3600/4 = Rs. 900 Principal amount = 9500 – 5 × 900 = Rs. 5000 So, R = 900/50000 × 100 = 18% Desired interest = 5000 × 0.25 × 2 = Rs. 2500 Hence, option b.
306, 272, 240, ?, 182, 156
18, 34, 70, 134, ?, 378
32 33 29 38 ? 47 11
...3.6 × 1.5 + 8.4 × 2.5 – 9.2 × 3.5 = ? – 9.2 × 4.4
14, 20, 29, 44, 65, ?
143 119 107 101 98 ?
23, 27, 39, 59, ?, 123
216, 81, 297, 378, ?, 1035, 1728