1) The average age of 30 boys in a class is 15 Years. One boy, aged 20 years, left the class, but two news boys come in his place whose ages differ by 5 years. If the average age of all the boys now in the class becomes 15 years, the age of the younger new comer is.

2) The angles of a quadrilateral are in the ratio of 2 : 5 : 9 : 8. The second largest angle of the quadrilateral is equal to the largest angle of a triangle. One of the angles of the triangle is 35 . What is the value of the third angle of the triangle?

3)Three men A, B and C working together can do a job in 6 hrs less time than A alone, in 1 hr less time than B alone and in one half the time need by C when working alone. Then, A and B together can do the job in how many hours?

4)A father is 3 years older than thrice the age of his son. Six years later, the father will be 12 years older than twice the age of his son. What is father’s present age?

5) A bag contains 4 red, 5 white and 6 black balls. If 3 balls are drawn one by one with replacement then what is the probability that all balls are white?

6) 113, 225, 449 ,?, 1793

7) 33, 321, 465, 537, 573, ?

8) 126, 64, 34, 20, 14, ?

9) 3, 4.5, 9, 22.5, 67.5, ?, 945

10) 8544, 1420, 280, ?, 18, 5