1+1= here are some easy points

About 400,000 people visited an art museum in december. what could be the exact number of people who visited the art museum?

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?