Saama was born on Saturday, 29th February 2020. What is the earliest year that her birthday could fall on a Saturday 29th February again?

In a group of 10 children, the youngest is 8 years old while the oldest is 16 years old. If the sum of the ages of those children is 120, what is the least possible number of children whose ages are more than 12 years but less than 16?

Nimal started a business by investing Rs. 500 000. After four months, Cader joined the business with an amount of Rs. 750 000. If the profit obtained at the end of three years after the business was started, was divided proportionate to both the money invested by each person and the time, what was the ratio of Nimal’s profit to Cader’s?

Bavan is going to drive from city A to city B. He drives the first one-third of his trip at an average speed of 30 km h^-1 and then the rest of the distance at an average speed of 40 km h^-1. The total trip from A to B takes 4 hours. What is the distance between A and B in kilometres?

A 200 metres long train travelling at a speed of 60 kilometres per hour takes 30 seconds to pass a tunnel. What is the lenght of the tunnel in metres?

To win a 50-over cricket match the target set is 309 runs. At the end of the 10th over the run rate was 4.5. What is the required minimum run rate in the remaining 40 overs to reach the target?