Q1:

Nick is five years younger than his elder brother who is eldest among four siblings.Amy is $\frac{5}{8}$of his eldest brother.Lee is eldest of four sibling and he is 24 years old.Find Tony’s age who is seven years younger to  Nick.

Q2:

Kate got married to James in the year 1990 and became 5th member of James family. In 2000 James mother died, and Kate gave birth to a Child. The average age of James family at his marriage is same as the average age when the child was born. Find the age of James Mother when she died?

Q3:

The average of N numbers is K .If one of the numbers , L is replaced with M, the average becomes Z .Find the relation between N,K,L,M and Z

Q4:

If a+b+c=2K then which of the following can be the average  of $a^2,b^2,c^2$,if ab+bc+ac=0.

Q5:

Eric and Megan got married in the year 2008. Their ratio of age at the time of their marriage was 5:4. At present Eric’s age is one-sixth more than Megan’s age. If Megan gave birth to a triplet four years back, then find the ratio of the age of Eric’s family four years ago to ratio of Eric’s family at present.(Note present age is calculated as on 2018)

Q6:

Five boxes numbered 1,2….5 are kept in a row respectively. Box 1 weights 100kg and weight of other boxes are defined by $w(x)=\left(x^2-\frac{1}{x}\right)w(1)$where x represent box number and w(x) represent weight of box numbered (x).Find the average of the three box present in the middle of row.

Q7:

Average age of five friends is 39 years. Dany is 7 years older than Gary. Gary is 9 years younger than Aston. Sam’s age is equal to the sum of ages of Dany and Gary and Sum of ages of Sam and Stark is 110 years. Find the age of Stark.

Q8:

Batting average of Virat in his 64 innings is 78.His highest score exceeds his lowest score by $\frac{17}{2}$times. If excluding these two innings his batting average is 75,find his highest score?

Q9:

The average weight of Gupta family is 83Kg.The average weight of Sharma family is 76Kg and average weight of Arora family is 85kg.If average weight of Gupta family and Sharma family is 79 kg and that of Sharma family and Arora family is 81kg.Find the average weight of 3 families.

Q10:

The average of N numbers is 24.If $\frac{3}{8}th$ of the number is doubled and remaining numbers becomes $\frac{5}{3}$times of its original value .Find the percentage change in the original and final average.