Quantitative Aptitude - Arithmetic Ability Questions

The ratio 1 : 5 can be expressed in decimal as

A man goes to a place on bicycle at speed of 16 km/hr and comes back at lower speed . If the average speed is 6.4 km/hr in total , then the return speed (in km/hr) is

A boy walking at the speed of 4 km/hr covers a certain distance in 6 hours 15 minutes. If he covers the same distance by cycle in 5 hours, then what is the speed (in km/hr) of the cycle?

A can do a piece of work in 10 days, B can do it in 12 days and C can do it in 15 days. In how many days will A, B and C finish it, working all together?

10 persons can do a job in X days. If 20 persons with twice the efficiency can do the same job in 5 days, then find the value of X?

The mean of 10 observations is 13. Two more observations are included and the new mean becomes 14. The mean of two new observations is

Select the odd word from the given alternatives.

Find the odd word/letter/number pair from the given alternatives