A alone can complete a work in 6 days and B alone can complete the same work in 8 days. In how many both A and B together can complete the same work ?

What is the sum of first 14 natural numbers?

Find the next term in the series.

1329, 997, 725, 507, 337, ?

How many bricks, each measuring 25 cm x 11.25 cm x 6 cm, will be needed to build a wall of 8 m x 6 m x 22.5 cm?

The number of pairs of natural numbers the difference of whose squares is 45 will be –

If 20 taps can fill a tank in 14 hours, then how many times will 35 taps fill that tank?

The two trains cross each other in 12 seconds, moving in the opposite direction, and they take 60 seconds to travel in the same direction. both trains can have speed in (m/sec).

ABC is an isosceles triangle with AB = AC. The side BA is produced to D such that AB = AD. If ∠ABC = 30°, then ∠BCD is equal to