Question
The simple interest on a certain sum for 4 years at 10%
per annum is Rs 240 less than the compound interest on the same sum for 2 years at 20% per annum. The sum is?Solution
Simple interest at 10% for 4 years =10*4 = 40%
Compound interest at 20% for 2 years = 20 + 20 + (20*20)/100 = 40 + 4 = 44%
Let the sum be Rs 'P'
44% of P - 40% of P = 240
4% of P = 240
P = (240*100)/4 = 60*100 = Rs 6000
1.2Â Â Â Â Â Â Â 4.2Â Â Â Â Â Â Â Â ? Â Â Â Â Â Â Â Â Â Â Â 18.2Â Â Â Â Â Â Â 33.2 Â Â Â Â Â Â 56.2
...5, 14, 41, 122, 365, 1094, ?
If 2.5 3.5 x 30 124 625
Then, x ² - 1 - 2x = ?
...157, 159, 189, 319, ‘?’, 1 407 , 2749 Â
1335Â Â Â Â Â Â 737Â Â Â Â Â Â Â Â 355Â Â Â Â Â Â Â Â 141Â Â Â Â Â Â Â Â 47Â Â Â Â Â Â Â Â Â Â ?
...8, 9, 15, ?,82.5, 250.50
22 44 176 1078 8448
...3 15 35 63 99 ?
95    216    72    241    ?    270
If   314     306      x      269       394    178    1480
Then, 1/3 x + 2x - x = ?
...
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