Quantitative Aptitude - Arithmetic Ability Questions

A student multiplied a number by 3/10 instead of 10/3. What is the percentage error in the calculation?

If 3x= 4y= 12, then z is equal to

∆XYZ is right angled at Y. If m ∠Z = 60. What is the length (in cm) of YZ, if ZX = 9√3 cm?

A train travels 20% faster than a car. Both start from point A at the same time and reach point B, 180 km away at the same time. On the way the train takes 30 minutes for stopping at the stations. What is the speed (in km/hr) of the train?

Profit of Rs 728000 has to be divided among three partners Amir, Balaraj and Charan in the ratio 7:5:4. How much share (in Rs) does Charan get?

A can paint a house in 25 days and B can do it in 10 days. Along with C, they did the job in 6.25 days only. Then in how many days, C alone can do the job?

If 23x + 23y = 184, then what is the average of x and y?

Find the LCM of 3.2, 2.72, 1.28 and 1.44