Question
Which of the following is a physical
change?Solution
Heating copper wire by electricity is a physical change as it involves only a change in temperature, not the composition. Other options are chemical changes, where new substances are formed.
Determine the time taken by a pipe R to empty a water tank.
Statement I: Pipe P and pipe Q can fill a water tank in 6 hou...
What is three digit number having each digit different from the other?
I. Each of the digits of the given number is a multiple of 2.
...
In an 800-meter race involving 'Amit', 'Bhanu', and 'Chinky', calculate the distance 'Amit' was ahead of 'Chinky'.
Statement I : 'Amit' finishes...
There are 7 people in a group. Average age of the group decreases by 5 when two more people join the group. Find the average age of the new group.
<...A group of students from two schools, M and N, were surveyed to find out their preferences for three subjects: Mathematics, Science, and English. The nu...
What is the area of the square?
I. The diagonal of the square is the 6√3m.
II. The perimeter of the square is 48m.
In a partnership business of A, B and C, what profit did B get at the end of 2 years?
I. A and B started the business by the investing in ratio 2...
What is the marked price of the furniture?
Statement I: A storekeeper marks his furniture 20% above the cost price and he allows 8(1/3)% discoun...
The cost price of an article is Rs. 600. How much profit did a trader get by selling the article, if it was sold at 15% discount?
I:Â The trader ...
What is the profit percentage earned on the mobile?
Statement I: 50% of the sum of the selling prices of the mobile and TV is Rs. 5400 more than ...
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