Q&Answers: Math/Chemistry/Physics Problems + Solutions

Length of a rectangular plot is 26 mtr more than its breadth.

George is 8 years more than Christopher and Ford is 2 years younger than Christopher.

The ratio of investments of two partners P and Q is 7:5 and the ratio of their profits is 7:10.

How many 3-digit numerals end with a digit that represents a prime number?

A person was asked to state his age in years.

A comittee of three people is to be chosen from four married couples.

A 250 metres long train running at the speed of 120 kmph crosses another train running in opposite direction at the speed of 80 kmph in 9 seconds.

In the x- y plane, there are 4 points (0,0), (0,4), (4,4), and (4,0).

If the area of circle is 684 sq cm then its circumference?

At a certain college there are three as many English majors as history majors and two times as many English majors as mathematics majors.

If the length of the diagonal of a square is 20cm,then its perimeter must be

The simple form of the ratio 5/8:3/2 is?

What is the tens' digit T of the sum of the first 40 terms of 1, 11, 111, 1111, 11111, 111111, ...?

Jane makes toy bears. When she works with an assistant, she makes 80 percent more bears per week and works 20 percent fewer hours each week.

What should come in place of the question-mark (?)

An old truck uses 16 gallons of diesel fuel in traveling 224 miles.

Jamshid can paint a fence in 50 percent less time than Taimour can when each works alone.

How many prime numbers K exist such that 90 < K < 106 and K is a factor of 99999919?

Twelve percent of the programmers in a startup company weigh 200 pounds or more.

Equal weights of two alloys containing tin, copper and lead in the ratio 5:2:7 and 8:11:9 are melted and mixed together.

A cyclist rides a bicycle 7 km at an average speed of 10 km/hr and again travels 10 km at an average speed of 7 km/hr.

Set K contains every multiple of 6 from 18 to 306 inclusive.

Convert 100 inches into centimeter?

An inspector rejects 10% of the meters as defective.