P and Q are prime numbers where P < Q and their LCM is 297. Find the value of 2Q – 5P.
The average height of 20 students increased by 1 inch when one of them whose height is 3ft. 4 inches is replaced by a new student. What is the height of the new student?
The value of log2 (log7 (2401)) is:
What is the number of ways of forming a sports team consisting of 7 girls and 4 boys from 10 girls and 5 boys?
What is the least number which when trippled will be exactly divisible by 6, 9, 10 and 21?
The average of four numbers is P, and the average of the other four numbers is Q. If the average of all these eight numbers is R, then
Find the median of the frequency distribution:
| Marks obtained | Number of students |
| 30–33 | 3 |
| 33–36 | 5 |
| 36–39 | 6 |
| 39–42 | 7 |
| 42–45 | 9 |
If logxy = 200 and log4x = 20, then the value of y is:
What is the average of the first five odd multiples of 11?
In how many ways can the letters of word “WORKBOOK” be arranged so that the vowels are always together?
