Rumi and Rony can finish a task, working together, in 12 days. If Rony alone can finish that in 20 days, how many days will Rumi need to finish the task working alone ?

The average age of 40 employees in a branch of a bank is 35 years . When a new employee joined the bank the av...

What should be added with 15480 to make it exactly divisible by 14 ?

In a two digit number, if it is known that its unit's digit exceeds its ten's digit by 2 and that product of t...

Two trains are moving in opposite directions at 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km re...

If 'n' is a natural number, then (6n2+6n) is always divisible by-

In a 500 m race the ratio of the speeds of two contestants Ajmal and Badal is 3:4 . If Ajmal has a head start...