List of top Arithmetic and Mental Ability Questions on Average

The average score of a cricketer in his 10 innings is 45 runs. If he has scored 70 runs in another 3 innings, then the average score of the player is
The average marks of 15 students in a subject is 65. If another student has scored 97 marks in the same subject, then the average marks of the 16 students is
Average ages of Ram and Manohar is 15, average ages of Manohar and Shyam is 12 and average ages of Ram and Shyam is 13, then the age of Manohar is?
The average score of a batsman after his 30th match was 25.5. After the 40th match, his average score increased by 3.2. What is his average score in the last ten matches?