Find out the value of a when $$x^3+ax^2+ 2x+3 $$ is divisible by (x+1)?

If a+b=17,and a – b =9, then the value of $$ {(4a^2+4b^2)}$$ is:

Eight consecutive numbers are given. If the average of the two numbers that appear in the middle is 6, then the sum of the eight given numbers is: 

The pie chart below represents the instruments played by students of a school. Read the chart and answer the following questions based on it.

If there are 300 students in total, what is the difference between those who play Tabla and those who play Veena? 

Solve: 0.05 × 0.4 

The ratio of age of two boys is 5 : 6. After two years the ratio will be 7 : 8. The ratio of their age after 12 years will be 

The table given below shows the information about bats manufactured by 6 different companies. Each company manufactures only plastic and wooden bats. Each company labels these bats as Brand A or Brand B. The table shows the number of plastic bats as a percentage of total bats manufactured by each company. It also shows the ratio of wooden bats labelled A and B. Each company manufactured a total 550000 bats.

X= Average of plastic bats manufactured by V, U and T.
Y=Wooden bats of Brand A manufactured by V.
What is the value X – Y?

The largest and the second largest angle of a triangle are in the ratio of 13:12 respectively. The smallest angle is 20% of the sum of the largest and the second largest angles. What is the sum of the smallest and the second largest angles?