John has 10 members of his family on his father's side. His mother's side is 30% larger. How many people are there in total?
Let's think: His mother's side is 10 * .3 = 3 people larger than his father's side. So his mother's side has 10 + 3 = 13 people. So the total number of people is 13 + 10 = 23.. The answer is: 23.

Lizzy's school choir has a mixture of 80 blonde and black-haired girls. Their teacher decides to add 10 more girls to the choir, who turns out to be blonde. If there were 30 blonde-haired girls in the choir initially, how many black-haired girls are present?
Let's think: The total number of girls in the choir is 80 + 10 = 90 girls. The total number of blondes in the choir after 10 more are added is 30 + 10 = 40 blonde - haired girls. From the total number, the number of black - haired girls is 90 - 40 = 50 black - haired - girls.. The answer is: 50.

Clara is climbing to the top of a historical tower with stone stairs. Each level has eight huge steps in the stairs. Every step is made up of three massive blocks of stone. By the time she reaches the top, she has climbed past 96 blocks of stone. How many levels are there in the tower?
Let's think: Clara climbed past 96 / 3 = 32 steps made up of 3 blocks of stone each. At 8 steps per level, there are 32 / 8 = 4 levels in the tower.. The answer is: 4.

Grace is filling her pool in the backyard with a hose that sprays 50 gallons/hour. She waited for 3 hours but the pool wasn't full, so she decides to add another hose that sprays 70 gallons/hour, and after 2 more hours the pool is full. How much water can Grace’s pool contain?
Let's think:
In the first 3 hours the pool gets 50 gallons / hour x 3 hours = 150 gallons. With the addition of the other hose, the pool was filling with a rate of 50 gallons / hour + 70 gallons / hour = 120 gallons / hour. In the next 2 hours with both hoses the pool gets 120 gallons / hour x 2 hours = 240 gallons. The pool's total capacity is 240 gallons + 150 gallons = 390 gallons.. The answer is: 390.