Maths

The ages of two friends, Ram and Ravi, differ by 7 years. Ram’s mother Mayadevi is three times as old as Ram, and Ravi is four times as old as his brother Soham. The ages of Mayadevi and Soham differ by 65 years. Find the age of Mayadevi (in years). Optionsa) 69b) 45c) 85d) 36 Solution As

Simplify  Optionsa) 0.28b) 0.48c) 0.42d) 0.37 Solution As per questionLet a = 0.58 , b = 0.1a3 – b3 = (a-b) (a2+b2+ab) = (a-b)(a – b) = 0.58 – 0.1 = 0.48 Ans: b) 0.48

Three pipes P, Q and R can fill a cistern in 40 minutes, 80 minutes and 120 minutes, respectively. Initially, all the pipes are opened. After how much time (in minutes) should the pipes Q and R be turned off so that the cistern will be completely filled in just half an hour? Optionsa) 10b)

Kiran lent Rs 4,000 to two persons such that one part of it at the rate of 8% per annum and the remaining part at the rate of 10% per annum. He got an annual simple interest of Rs 352. Then the sum lent at 10% is: Optionsa) Rs. 1800b) Rs. 2400c) Rs. 1600d) Rs. 2200 Solution

Find the gain percentage , given that Priya sold her scooter for Rs 42564 gaining 1/6th of the selling price. Optionsa) 40%b) 20%c) 15%d) 30% Solution As per questionPriya sold her scooter (SP) = 42564 Rs.gaining  of the selling price (P) = 1/6thP = P = 7094CP = SP – P CP = 42564 – 7094

The marked price of an article is 26% more than its cost price. If a discount of 32% is given, what will be the loss percentage? Optionsa) 15.25%b) 14.32%c) 12.26%d) 18.64% Solution As per questionMP = CP x 1.26Discount on MP 32%SP = (CP x 1.26) x .68SP = CP x .8568Loss = SP – CP

A person earns Rs 16,000 per month and spends 80% of his income and saves the remaining amount. If his income increases by 20% and expenditure by 10%, find the percentage of increase in his savings. Optionsa) 140 %b) 90 %c) 60 %d) 120% Solution As per questionIncome = 16000Expenditure = 80%Saving = 3200Expenditure = Income x

The average temperature of a city for the first sixteen days of January is 22°C, and the average temperature for the last sixteen days of the same month is 26°C. If the average temperature for the entire month is 24°C, what is the temperature on the sixteenth day? Optionsa) 240Cb) 250Cc) 220Cd) 230C Solution As per questionTotal temperature

In an election between two candidates, y% of the voters did not vote. 10% of the votes cast were declared invalid, while all the valid votes were cast in favour of either of the two candidates. The candidate who got 59.375% of the valid votes cast was declared elected by 2484 votes. If the number of people eligible