Question
After increase in the price of coffee by 25%, a person
is able to buy 4 kg less for Rs. 1,640. Find the original and increased price of the coffee per kg.  ÂSolution
Let the original price (O.P.) be Rs. x per kg. ∴ New price (N.P.) = 125% of x = Rs. 5x/4 per kg. Quantity of coffee the person could buy at original price = 1640/x kg. Quantity of coffee he can buy at new price = (1640 × 4)/5x = 1312/x kg Given that difference between the quantity at original price and at new price is 4 kg. ∴ 1640/x - 1312/x = 4 ⇒ 328/x = 4 ⇒  = 82 ∴ O.P. = Rs.82 and N.P. = Rs. 5x/4 = (5 × 82)/4 = Rs.102.5
Identify the given logic and complete the series with the correct option. 12, 15, 18, 20,?
12                          13                         30                     �...
5 4 29 24 185 ?
112    162    199    ?     242    252
...6   16  ?     244  1,245  7,506  52,591
3Â Â Â Â Â Â Â Â Â Â Â Â Â Â 25Â Â Â Â Â Â Â Â Â Â Â 173Â Â Â Â Â Â Â Â Â 1041Â Â Â Â Â Â Â 5201Â Â Â Â Â Â Â 20809
10       a �...
16 9 ? 13.25 22.625 36.3125
...D irection: Which of the following will replace ‘?’ in the following series
10,14,’?’,199, 352, 530
...22, 23, 31, 57, 122, 247
5, 7, 10 , 15 , 21 , 33
