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Practice Databased Questions and Answers

What is the number of Astronauts who were going to both Mars and Moon only?
What is the number of Astronauts who were going to only one of the mission?
What is the ratio between Astronauts who were going to only Venus and who were going only to both Moon and Venus?
What is the number of Astronauts who were going to more than one mission?
How many nuclear bombs Russia had initially?
How many bombs America buys every year?
After 14 years how many nuclear bombs did America and China had in total?
By what percent the number of nuclear bombs that America had was less than that of Russia after 20 years?
If Russia and America keeps on buying nuclear bombs in same manner, then the number of nuclear bombs they will have in total after 50 years is?
If the cost of 3AC class ticket of train Q is Rs. 1520 for any two stations, find the total revenue earned by train Q from 3 AC coaches.
The number of passengers travelling in sleeper class of train Q is approximately what percent of the number of passengers of both train P and train Q toget...
If the ratio of the cost of a ticket of general class to that of first class is 2 :3, then find the ratio of the revenue earned from general class and fi...
The total number of passengers in general class of train Q and 3 AC coach of train P together is approximately what percent of the total number of passenge...
What is the average number of passengers travelling in general class, sleeper class by both the trains? ...
What is the total number of females working in the HR and Marketing departments together?
What percent of the total number of boys in Heritage School who participates in ‘Cycling’?
What percent the total number of girl in Delhi Public School who participates in Tennis?
What is the total number of girls who participates in Horse Riding in Heritage School and Delhi Public School together?
What is the difference between the average number of boys participating in ‘Tennis’ in both the schools together and average number of girls partici...
In Delhi Public School, what is the respective ratio between the total number of participants (both boys and girls) who participates in ‘Tennis’ and th...
Supporters of Mumbai in the crowd finally is approximately what percent of the initial number of supporters of Pune in the beginning at 8.00 pm?
Supporters of Pune in the crowd finally is approximately how much percent less or more than the number of Pune supporters who left after the match was dela...
Which of the following statement is not true? I.At every point of time, number of Mumbai fans was more than the number of Pune fans. II. Ratio between the ...
What is the difference between the Mumbai and Pune supporters after the match was restarted?
What would have been ratio of the supporters of Mumbai and Pune at 10.00 pm initially before the new arrivals, if those 30% of the supporters came back wer...
In an election, a voter may vote for any number of candidates not greater than the number to be chosen. There are 8 candidates and 5 members are to be chos...
Suppose that the reliability of a COVID test is specified as follows: Of people having COVID, 90% of the test detect the disease but 10% go undetected. O...
Find the approximate value of (81.5)1/4
Find the angle between the lines whose direction ratios are a, b, c and b − c, c − a, a − b.
If O be the origin and the coordinates of P be (1, 2, −3), then find the equation of the plane passing through P and perpendicular to OP.

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