For the following questions answer them individually
If a certain sum of money becomes double of itself in 3 years 6 months at simple interest, then what will be the annual rate of interest?
The bar graph shows the candidates recruited in the 2 different banks. M and N in different years. What is the average number of candidates in bank N in all the years together?
By selling 55 meters of cloth, one gains the selling price of 11 meters. Find the gain percent.
The average age of four brothers is 24 years. If their father is included, the average is increased by 6 years. Find the age of the father (in years)
The value of $$74 + 88 \div 8 \times 10$$ of $$5 - 90 \div 15 + \left\{44 - \left(108 \div 12\right)\right\}$$ is:
Dev completed the school project alone in 40 days. How many days will Arun alone take to complete the same work if he is 25% more efficient than Dev?
Three numbers are in the ratio 2 : 3 : 5 and their LCM is 60. What is the HCF of the numbers?
A man goes to a place on the car at a speed of 144 km/hr and comes back at a speed. If the average speed is 60 km/hr in total, then find his returning speed (in km/hr).
If the length of a rectangle is decreased by 13% and the breadth is increased by 13%. Find the change of percentage in its area.