Question
Select the number from among the given options that can
replace the question mark (?) in the following series. 2, 13, 29, 55, 96, 157, 243, ?Solution
2, 13, 29, 55, 96, 157, 243, ? First difference between 2 and 13 is 11, 13 and 29 is 16... and So on 157 and 243 is 86. Now, the difference between the differences is 5, 10, 15, 20, 25, and 30 respectively. So, the final answer is 359.
The average of 11 observations is 60. If the average of first five observations is 58 and that of last five is 56, the sixth observation is
The average age of a group of 50 students is 16 years. If 3 students whose ages are 18 years, 26 years, and _____ years are replaced by 3 new students w...
The average of 20 numbers is 75. The average of the first 12 numbers is 80, while the average of the last 11 numbers is 68. If the 12th number is remove...
- The average height of a group of 30 players was recorded as 168 cm. Later it was discovered that 172 was wrongly written as 182 and 160 was written as 150....
In a class of 50 students there are 22 girls who scored an average of 35 marks in the test. What is the average marks of the boys if the class average ...
In an examination, the average marks obtained by the students is 85. After correcting the quantitative mistakes, the average of 100 students is reduced ...
The average weight of a group of five persons, A, B, C, D, and E is 80 kg. If another person K joins the group then the average weight of the group is d...
The average age of a class of 22 girls is 18 years. If 2 new girls having average age of 12 years join the class, then the average age of the class beco...
The average age of 18 children and their teacher's age are 15 years. If the teacher's age is excluded, the average reduces by 2. What is the teacher's age?
When the average age of a husband and wife and their son was 44 years, the son got married and a child was born just one year after their marriage. When...
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