If a number is increased by 20% and then decreased by 20%, what is the net change?
Let the number be 100. After 20% increase: 120. After 20% decrease of 120: 120 × 0.8 = 96. Net change = 96 - 100 = -4, which is 4% decrease.
A merchant bought goods for Rs. 400 and marked them at 40% above the cost price. He gave a 10% discount. What is his profit percentage?
Cost price = 400. Marked price = 400 × 1.40 = 560. Selling price = 560 × 0.90 = 504. Profit = 504 - 400 = 104. Profit % = (400104) × 100 = 26%.
If 5 men can do a work in 12 days, how many men are needed to do the same work in 3 days?
Work = 5 × 12 = 60 man-days. For 3 days: Men needed = 360 = 20 men.
What is the LCM of 24, 36, and 48?
24 = 2^3 × 3, 36 = 2^2 × 3^2, 48 = 2^4 × 3. LCM = 2^4 × 3^2 = 16 × 9 = 144.
A person invests Rs. 10,000 at 10% per annum for 2 years. What is the compound interest?
CI = P(1+R/100)^T - P = 10000(1.1)^2 - 10000 = 10000(1.21) - 10000 = 12100 - 10000 = 2100.
Advertisement
Find the odd one out: 12, 24, 36, 48, 62
12, 24, 36, 48 are all multiples of 12. 62 is not a multiple of 12.
A clock shows 3:00. What is the angle between the hour and minute hands?
At 3:00, the minute hand is at 12 and hour hand is at 3. Each hour represents 30° (360°/12). Angle = 3 × 30° = 90°.
If x^2 + 5x + 6 = 0, what are the roots?
x^2 + 5x + 6 = (x+2)(x+3) = 0. So x = -2 or x = -3.
What is 25% of 60% of 1000?
60% of 1000 = 600. 25% of 600 = 150.
A man walks 4 km north, then 3 km east, then 4 km south. How far is he from the starting point?
Net displacement north: 4-4 = 0. Net displacement east: 3. Distance from starting point = 3 km.
What is the square root of 169?
Complete the series: AZ, BY, CX, DW, ?
First letter increases: A→B→C→D→E. Second letter decreases: Z→Y→X→W→V. Answer is EV.
What is the antonym of 'Benevolent'?
Benevolent means kind and generous. Malevolent means evil or harmful, which is the opposite.
Choose the correct spelling:
The correct spelling is 'Occasion' with two c's and one s in the middle.
Fill in the blank: He is not only intelligent _____ also very creative.
The correlative conjunction 'not only...but also' is used here. 'But' is the correct answer.
What is a synonym for 'Meticulous'?
Meticulous means very careful and precise. Careful is the best synonym.
What does 'Ambiguous' mean?
Ambiguous means unclear or open to multiple interpretations.
What is the difference between 'Advice' and 'Advise'?
Advice (noun): an opinion or recommendation. Advise (verb): to give advice or recommend.
What is a 'Paradigm'?
A paradigm is a typical example, pattern, or model of something.
Which of the following is the correct use of an apostrophe?
The apostrophe in 'dog's' indicates possession. The bone belongs to the dog.
