Question
Rs.7800 is divided into two parts such that if one part
be invested at 3% and the other at 5%, the annual interest from both the investments is Rs. 320. Find each part.Solution
Let the amount lent at 3% rate = Rs. x. Then, amount lent at 5% rate = 7800 - x So, => 3% of x + 5% of (7800 - x) = 320 => 5% of 7800 – 2% of x = 320 => 390 – 2% of x = 320 => 2% of x = 70 => x = (70/2) × 100 => x = Rs. 3500 Amount lent at 3% rate = Rs. 3500 Amount lent at 5% rate = 7800 – 3500 = Rs.4300
55   56    52   61    ?      70    34
...12 ? 545 2729 10919
204, ?, 120, 83, 52, 23
What will come in place of the question mark (?) in the following series?
50, 70, 110, 190, 310, ?
What will come in place of the question mark (?) in the following series?
206, 187, ?, 157, 146, 139
36   37    33   42    ?      51    15
...150 - 10 × ( 7 - 2)/4 × 8 = ?
...9    14    38    129    ?   2705   16260
...10,14,26,42,70,?
7    12    34    117    ?   2465   14820
...
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