CBSE - Aptitude Mathematics

In a house, there are six 40 watt lamps which are on for 5 hours a day and three 80 watt fans which are on for 10 hours a day. If electricity costs Rs.2 per kilowatt hour, what is the monthly electricity bill? 1. Rs.216 2. Rs.280 3. Rs.315 4. Rs.400

Sanjay and Komal started a business investing Rs. 15,000 each. After 8 months 'Komal withdrew Rs. 10,000 from his share. If they get Rs. 32,000 as profit at the end of the year, how much share of profit should Sanjay get? (I) Rs. 18000 (2) Rs. 16000 (3) Rs. 12800 (4) Rs. 19200

In a distribution variance is 144 and the mean is 30. The coefficient of variation will be 1.40 2.30 3.25 4.35

Average age of a class of 39 boys is 10 years, but by the admission of one Harish, the average age is raised to 10 years and a month. What is Harish's age? 1.13 years 4 months 2.13 1/2 years 3.14 years 4.13 years

By what least number 101376 be multiplied that it may be a perfect square (1) 11 (2) 12 (3) 7 (4) NONE OF THESE