Last year, a Home Appliance Store sold an average(arithmetic mean) of 42 microwave ovens per month. In the first 10 months of this year,the store has sold an average(arithmetic mean) of only 20 microwave ovens per month. What was the average number of microwave ovens sold per month during the entire 22 months period ?
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Mr. Bean chooses a number and he keeps on doubling the number followed by subtracting one from it, if he chooses 3 as initial number and he repeats the operation for 30 times then what is the final result?
Hoses A and B spout water at different constant rates, and hose A can fill a certain pool in 8 hours. Hose A filled the pool alone for the first 2 hours and the two hoses, working together, then finished filling the pool in another 3 hours. How many hours would it have taken hose B, working alone, to fill the entire pool?
In the coordinate plane, a triangle has vertices at (a,0), (b,0), and (x,y). If a>x>b>0>y, which of the following represents the area of that triangle?
An accurate clock shows 7 o'clock in the morning. The hour hand then rotates by 90o. The time in the clock is:
Mr. X died when his age was 1/59th of year of birth. What was his date of birth?
30% of all Huhulians own at least one TV. 24% of Huhulians who own at least one TV own at least four TV's. What percent of Huhulians own at least four TV's?
Manoj left home for the bus stop 15 minutes earlier than the usual time. It takes 10 minutes to reach the stop. He reached the stop at 8.40 AM. What time does he usually leave home for the bus stop?
The original retail price of an appliance was 60 percent more than its wholesale cost. If the appliance was actually sold for 20 percent less than the original retail price, then it was sold for what percent more than its wholesale cost?
The distance between Omaha and Lincoln is 60 miles. John drives a car that gets 30 miles per gallon of gas, and David drives a car that gets 20 miles per gallon. How many more gallons of gas does David use on a round trip from Omaha to Lincoln?
Divide the number 49 into two parts, such that if the greater part is increased by 6 and the lesser part is decreased by 11, their ratio is 9 to 2.
The length of the ribbon was originally 30 cm. It was reduced in the ratio 5 : 3. What is its length now?
Two numbers are said to be relatively prime if they share no common positive factors other than 1. Set S contains the set of integers from 1 to 1,000, inclusive. What is the probability that a number chosen from S is relatively prime to 1,000?
Lucy has enough money to go to Canada every 6 years, while Luke has enough to go every 9 years. If they pool their money, how often can they go?
A train M leaves City A at 5 am and reaches City B at 9am. Another train N leaves City B at 7am and reaches City A at 1030am. At what time do the 2 trains cross one another?
A car after covering 1/2 of a journey of 100 km develops engine trouble and later travels at 1/2 of its original speed. As a result, it arrives 2 hours late than its normal time. What is the normal speed of the car is?
Train ‘A’ leaves Mumbai Central for Lucknow at 11 am, running at the speed of 40 kmph. Train ‘B’ leaves Mumbai Central for Lucknow by the same route at 2 pm on the same day, running at the speed of 72 kmph. At what time will the two trains meet each other?
The root(s) of 15/(x2 - 4) – 2/(x - 2) = 1 is (are):
Elliot has $1500 to buy a new laptop. His father gave him another $600 for a better model. Elliot saw a new mobile and he decided to by it for 400$. Also, he bought a laptop for $1300
How much money had Elliot left with?
A man earns RS. 20 on the first day and spends Rs. 15 on the next day. He again earns Rs. 20 on the third day and spends Rs. 15 on the fourth day. If he continues to save like this, how soon will he have Rs. 60 in hand?
A club consists of members whose ages are in A.P. The common difference being 3 months. If the youngest member of the club is just 7 years old and the sum of the ages of all the members is 250, then number of members in the club are :
There was a simple interest of Rs. 4016.25 on a principal amount at the rate of 9% p.a. in 5 years. Find the principal amount.
The price of a product is reduced by 30% . By what percentage should it be increased to make it 100%
Fernando purchased a university meal plan that allows him to have a total of 3 lunches and 3 dinners per week. If the cafeteria is closed on weekends and Fernando always goes home for a dinner on Friday nights, how many options does he have to allocate his meals?
In your study are displayed your 5 favourite puzzle books. If you decide to arrange the five books in every possible combination and moved just one book every minute, how long would it take you ?