If the side of a square is increased by 25%, then its area increases by ____. A. 25% B. 55% C. 40.5% D. 56.25% Explanation: Area change = (1.25)² = 1.5625 → 56.25% increase.
If the side of a square is increased by 25%, by what percent does its area increase? A. 25% B. 40% C. 50% D. 56.25% Explanation: Area increases by (1.25)² − 1 = 56.25%.
If the roots of a quadratic Equation are 20 and −7, what is the Equation? A. x² + 13x − 140 = 0 B. x² − 13x + 140 = 0 C. x² − 13x − 140 = 0 D. x² + 13x + 140 = 0 Explanation: Sum = 13 and product = −140, so equation is x² − 13x − 140 = 0.
If the selling price of an article is Rs. 240 after 20% loss, what was its cost price? A. Rs. 260 B. Rs. 280 C. Rs. 300 D. Rs. 320 Explanation: 80% = 240 ⇒ CP = 300.
If a number is increased by 50% and becomes 150, what was the original number? A. 80 B. 90 C. 100 D. 120 Explanation: 150% = 150 ⇒ original = 100.
If 9 workers can complete a job in 6 days, how many days will 3 workers take? A. 12 B. 15 C. 18 D. 20 Explanation: Work = 54 ⇒ 54/3 = 18.
If the area of a rectangle is 180 cm² and the breadth is 12 cm, what is the length? A. 10 B. 12 C. 15 D. 18 Explanation: Length = 180/12 = 15.
If the ratio of two numbers is 7:9 and their difference is 10, what is the smaller number? A. 25 B. 30 C. 35 D. 45 Explanation: Difference = 2 parts ⇒ 1 part = 5 ⇒ smaller = 35.
If 7 pencils cost Rs. 21, what is the cost of 1 pencil? A. Rs. 2 B. Rs. 3 C. Rs. 4 D. Rs. 5 Explanation: Unit cost = 3.
If a person walks 4 km/h for 2 hours, how much distance does he cover? A. 6 km B. 8 km C. 10 km D. 12 km Explanation: Distance = 4×2 = 8 km.