11, 33, 55, 77
What is the unit digit in 7225?
Find the ratio of a dozen and a score
Find the next number in the sequence: 80, 10, 70, 15, 60, ...
When two coins are tossed simultaneously, what are the chances of getting at least one tail ?
The ratio between two numbers is 5:7, and their product is 560. What is the difference between the two numbers?
3 pumps, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?
A man, a woman, and a boy can complete a piece of work in 3, 4, and 12 days respectively. How many boys must assist one man and one woman to complete the work in one and a half days?
One year ago, the ratio between Samir and Ashok's ages was 4:3. One year from now, the ratio of their ages will be 5:4. What is the sum of their present ages in years?
Three sisters Pia, Mia, and Jia work together to make brooches. Pia alone can complete the work in 10 days, Mia in 8 days, and together all can complete it in 4 days. They earn a total of Rs. 2,900. Find Mia's share if the money they received is proportional to the work they do.