Questions and Answers with Explanation
1.The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is:
2. A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in:
3.The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.
4. In how many different ways can the letters of the word 'CORPORATION' be arranged so that the vowels always come together?
5. What was the day of the week on 17th June, 1998?
6.The value of [(10)150 ÷ (10)146]
7.How many 4-letter words with or without meaning, can be formed out of the letters of the word, 'LOGARITHMS', if repetition of letters is not allowed?
8.A is 30% more efficient than B. How much time will they, working together, take to complete a job which A alone could have done in 23 days?
9.At what time between 9 and 10 o'clock will the hands of a watch be together?
10. On what dates of April, 2001 did Wednesday fall?