Develop speed and accuracy in arithmetic, algebra, geometry, percentages, ratios and other quantitative concepts.
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A and B together do a job in 12 days. A alone takes 18 days. How long does B take alone?
solve: 7 + (6 − 2) × 3 = ?
What is the slope of a line perpendicular to y = 2x + 3?
A sum of Rs. 2100 is divided between A and B in the ratio 4:3. Find A's share.
Average weight of 20 boys is 55 kg and of 15 girls is 50 kg. Find the average weight of all students.
A sum doubles itself in 8 years at simple interest. What is the rate?
A pipe fills a tank in 6 hours another empties it in 8 hours. Both open: how long to fill?
solve: (10 − 4) × (3 + 1) = ?
Rationalize the denominator: 1 divided by √2
solve: (20 − 8) ÷ 4 + 5 = ?
Two numbers are in ratio 5:3 and their sum is 40. What is the larger number?
What is the geometric mean of 4 and 16?
What is the discriminant of x² - 5x + 6 = 0?
solve: (9 + 3) ÷ 3 + 2 = ?
The average of 10 numbers is 25. A new number 47 is added. Find the new average.
If 2 to the power x equals 64 what is x?
solve: 10 − (2 + 3) × 1 = ?
A sum of Rs. 1260 is divided between A and B in the ratio 7:2. Find the smaller share.