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

Which of the following numbers is between 1⁄2 and 1⁄4?

if 2 pipes take an hour to fill a tank, then how long should 8 pipes take to fill the same tank?

Find √? /19 = 4 ?

How many numbers between 200 and 400 begin or end with 2?

A square and an equilateral triangle have the same perimeter.

If 600y is a perfect square (the square of an integer) and y is a positive integer, then which of the following must also be an integer?

If m times the mth series of an A.P. is equal to n times its nth series, what is the (m+n)th term of the A.P. ?

A fruit salad mixture consists of apples, peaches, and grapes.

Kim finds a 5-meter tree branch and marks it off in thirds and fifths.

At Tea factory, each employee working the second shift produced 2/3 as many widgets as each employee working the first shift.

The mean of 50 observations was 36.

In a class, the average age of 40 boys is 18 years and the average of 30 girls is 15 years. what is the average age of the whole class?

In a theater, the first row has 14 seats and each row has 2 more seats than previous row.

A motorcycle importer is planning on increasing the price of a certain model by $1000.

Which of the following lines is perpendicular to y = − 2x + 3 and has the same y-intercept as y = 2x − 4?

For positive integers s and t, which of the following can be written as t^2?

If x is a number such that x^2 + 3x - 10 = 0 and x^2 + x - 20 = 0, then x =

Navjivan Express from Ahmedabad to Chennai leaves Ahmedabad at 6.30 a.m. and travels at 50 kmph towards Baroda situated 100 km away.

A chemist mixes one liter of pure water with x liters of a 60% salt solution, and the resulting mixture is a 15% salt solution.

There are 17 students in a certain class.

A and B invests Rs.8000 and Rs.9000 in a business.

A 250 meter long train crosses a platform in 40 seconds while it crosses a signal pole in 20 seconds.

In an examination 35% of the students passed and 481 failed.

For how many integer values of n will the value of the expression 4n + 7 be an integer greater than 1 and less than 200?