Exams

The simplified value of 3-212-18 - 13 × 27 - 12 x 273 is closest to

A pipe, working at full speed, can fill an empty cistern in 1 hour. However, during the first hour it worked at one-twelfth of its capacity, during the second hour at one-ninth of its capacity, during the third hour at one-sixth of its usual capacity and during the fifth hour it was only one -third as efficient as it was supposed to be. A second pipe also displayed similar performance, but if it worked at full speed would have filled the empty cistern in 2 hours. Together with a drain pipe that drained water out of the tank at a constant rate, the empty cistern could be filled in 5 hours, all the three pipes working concurrently. How many hours will it take the drain pipe to empty the filled cistern if no other pipe was functioning during the time?

The mean of the 5 smallest numbers from a group is 15 while the mean of all the 13 members of the group taken together is 17. What is the mean of the 8 largest numbers?

Among chemical properties, Mendeleev concentrated on the compounds formed by the elements with

Find the range of the data : 11,13, 9, 17, 13, 19, 10, 11

Which of the following cube in the answer figure cannot be made based on the unfolded cube in the question figure?

Longest day in the Northern hemisphere is ________.

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select ‘No Error’.

Good role models in classrooms and in communities are the most important (1)/ part of getting educate as the actions and decisions (2)/ of role models impact the behaviour of others. (3)/ No error (4)