Question
The length of a rectangle is increased by 20% and the
width is decreased by 10%. What is the percentage change in the area of the rectangle?Solution
Let length = 100 and width = 100. New length = 120, new width = 90. Original area = 100 × 100 = 10000. New area = 120 × 90 = 10800. Percentage change = [(10800 - 10000) / 10000] × 100 = 8% increase. Answer: a) 8% increase.
What will come in place of the question mark (?) in the following series?
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...What value should come in the place of (?) in the following number series?
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What will come in place of the question mark (?) in the following series?
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In each of the following number series, one term is missing. Find the missing term.
3, 5, 20, 24, 144, 150, ?
1029, 1030, 1039, 1064, ?, 1194
75, 80, 95, ?, 155, 200
What will come in place of the question mark (?) in the following series?
1515, 184, ?, 455, 967, 624
7 29 61 ? 211 349
...
