Question
A man sells an article at a certain price incurring 20%
loss. If he had sold the same article for Rs. 20 more he would have earned 20% profit. What was the cost price of the said article?Solution
ATQ, Let the cost price of article be 100x When sold at loss SP = 100x - (20/100) × 100x = 80x When sold at profit SP = 100x + (20/100) × 100x = 120x According to the question, 120x - 80x = 20 ⇒ 40x = 20 ⇒ x = 0.5 ⇒ 100x = 50  ∴ Cost price of article is Rs. 50
24, 42, 60, ?, 96, 114
What will come in place of (?) question mark in the given number series.
10, 17, 26, 37, 50, ?
660, 653, 639, 618, 590, ?
What will come in place of the question mark (?) in the following series?
75, 219, 388, ?, 809, 1065168, 178, ?, 273, 400, 618, 963
60   61    57   66    ?      75    39
...What will come in place of the question mark (?) in the following series?
2, 5, 14, 41, 122, 365, ?
81, 83, 87, 95, 111, ?
What will come in place of the question mark (?) in the following series?
400, 841, 1202, ?, 1716, 1885
64, 66, 69, 74, 81, ?
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