Question
A person saves 20% of his monthly income. If his monthly
is increased by 54% and he still saves the same amount as before then find percentage increase (approximate) in his monthly expenditure.Solution
Let monthly of person is Rs. 100x Monthly savings = 0.20 × 100x = Rs. 20x Monthly expenditure = 100x – 20x = Rs. 80x His increased monthly income = 1.54 × 100x = Rs. 154x His monthly expenditure now = 154x – 20x = 134x Percentage increase in expenditure = [(134x – 80x)/80x] × 100 ~ 67.5%
Choose the missing term.
3F, 6G, 11I, 18L,?
60, 100, 160, 240, ?, 460
1 12 31 58 93 ?
32, 48, 72, 108, ?, 243
36   37    33   42    ?      51    15
...1500 Â Â Â 150Â Â Â 30Â Â Â ? Â Â Â Â 3.6Â Â Â Â 1.8
9 28 83 250 ? 2248
4    9    28    99    ?   2105   12660
...12, 25, 51, ?, 207, 415Â
18    ?    20    13     22     11