Ineed an easy way to memorize 100 digits of pi for extra credit

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?

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?