Numerical Appli...

A completes half as much work as B and C completes half as much work as A and B together, in the same time. If C alone can completes the work in 40 days, all of them can together finish the work in

A, B and C can do a piece of work in 11 days, 20 days and 55 days respectively, working alone. How soon can the work he done if A is assisted by B and C on alternate days?

A manufacturer built a machine which will address 500 envelops in 8 minutes. He wishes to build another machine so that when both are operating together they will address 500 envelops in 2 minutes. The equation used to find how many minutes x it would require the second machine address 500 envelopes alone is:

If m men can do a job in d days, then m + r men can do the job in:

A contractor deploys 36 men on a work and in 16 days they complete $$\dfrac{2}{3}$$rd of the work. To finish the remaining work he deploys 12 men extra. Now the remaining work will be completed in

If $$20$$ men working $$8$$ hours per day can complete a piece of work in $$21$$ days. How many hours per day must $$48$$ men work to complete the same job in $$7$$ days

The number of permutations of the letters of the word $$HONOLULU$$ taken $$4$$ at a time is

Khilona earned scores of $$97$$, $$73$$ and $$88$$ respectively in her first three examinations. If she scored $$80$$ in the fourth examination, then her average score will be

The total number of different combinations of one
or more letters which can be made from the letter of the word MISSISSIPPI is,

Number of arrangements of the letter $$HOLLYWOOD$$ in which all $$Os$$ are separated.