Question
Ravi sold two items for Rs. 8,400 each. He gained 20% on
one item and incurred a loss of 20% on the other. What is the difference in their cost prices?Solution
ATQ,
Cost price of the item sold at 20% gain = 8400 ÷ 1.2 = Rs. 7,000
Cost price of the item sold at 20% loss = 8400 ÷ 0.8 = Rs. 10,500
So, required difference = 10500 - 7000 = Rs. 3,500
18Â Â Â Â Â Â Â Â Â Â Â Â 29 Â Â Â Â Â Â Â Â Â Â Â Â Â Â 51 Â Â Â Â Â Â Â Â 84 Â Â Â Â Â Â Â Â 128 Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 182
If 4 10 16 26 x 50
Then find the value of (x² - 1) + ( x² + 1).
...4, 8, 24, ?, 840, 9240
32, 65 , 196, 785, ? , 23557
16 18 14 20 12 ?
...362Â Â Â 284Â Â Â 393Â Â Â Â 451Â Â Â Â 144Â Â Â Â Â 221
...24  12  18  ?  157.5  708.75  3,898.125
Choose the number which is different from others in the group.
21 11.5 13 ? 45.5 116.75
...31   48    67    90   ?      150
