CBSE - Aptitude Mathematics

Shail and Monu finish a job in 21 days. Shail alone does it in 42 days. How long Monu working alone will take to do it? 1. 42 days 2. 31 1/2 days 3. 21 days 4. 35 days

An article sold at Rs. 425 earned profit equal to the loss incurred when sold for Rs. 375. What is the eost price of that ar&shy;ticle? (1) Rs. 370 (2) Rs. 385 (3) Rs. 390 . (4) Rs. 400

On simplification, 1/0.04 is equal to 1. 2 1/2 2. 25 3. 2/5 4. 1/40

In a class there are as many students in a row as there are rows. If the total number of students is 81, the no. of students in much row is 1.9 2.3 3.27 4.none of these

The existence of the unique solution of the system x+y+z=b, 2x+3y-z=6, 5x-y+az=10 depends on 1. b only 2. a only 3. a and b 4. neither a nor b