Question
A student's average score across five subjects is 72. If
the scores in four subjects are 68, 75, 70, and 80, what is the average of the top three highest-scoring subjects?Solution
Total marks of 5 subjects = 72×5 = 360 Marks of 5th subject = 360 – (68+75+70+80) = 360-293 = 67 Top 3 scores = 80, 75, 70 Required average = 1/3 (80+75+70) = 225/3 = 75
Find the wrong number in the given number series.
 31, 25.5, 36.5, 90, 353, 2838
Find the wrong number in the given number series.
22, 29, 50, 89, 134, 197
45, 54, 66, 84, 99, 120, 144
Find the wrong number in the given number series.
2, 6, 24, 121, 720, 5040
8, 7, 12, 35, 128, 635
Find the wrong number in the given number series.
88, 110, 148, 198, 275, 396
12, 14, 18, 26, 38, 64
5, 11, 19, 27, 41, 55
72, 80, 89, 153, 180, 394Â
8, 17, 35, 71, 143, 287