For the following questions answer them individually
P and Q can together finish a work in 21 days. Ihey worked together for 12 days and Q left. After that. P finished the remaining work in 15 days. In how many days P alone can finish the work?
The average height of 23 boys is 1.2 m. When 3 boys leave the group, then the average height increases by 0.15 m. What is the average height of the 3 boys who leave?
A shopkeeper gives 10% discount on the cost of rice. A buyer could purchase 5 kg more rice for 720. Find the selling price of rice per kg.
An express train travelled at an average speed of 120 km/h, stopping for 4 min after every 80 km. How long did it take to reach its destination at the distance of 720 km from the starting point?
The cost of levelling a circular park at ₹6.50 per m2 is ₹36,036. What is the cost (in ₹) of putting a fence around it at
₹18 per m? (Take $$\pi = \frac{22}{7}$$)
The value of $$20 - \left[7 - \left{4 - \left(8 - \overline{6 + 3}\right)\right}\right]$$
An article was sold at $$\frac{5}{8}$$of its cost price. The loss per cent is:
By what percentage is one-third of 90 lesser than three-eighths of 160?
The sum of three numbers is 172. If the ratio of the first number to the second number is 3 : 5 and that of the second number to the third number is 7 : 6, then find the first number.
What is the least five-digit number that is exactly divisible by 21, 35, and 56?
