A book club is selecting members based on the following conditions: members must have read at least three books in the last year and must be over 18 years old. Emma has read five books and is 20, Liam has read two books and is 19, and Noah has read four books but is 17. Who can join the book club?
A box contains red, blue, and green balls. If there are twice as many red balls as blue balls and three times as many green balls as red balls, which color has the least number of balls?
In a group of five friends: Alice, Bob, Charlie, David, and Eva, the following conditions apply: 1) Alice cannot sit next to Bob. 2) Charlie must sit next to David. 3) Eva can sit anywhere. Which of the following arrangements is valid?
A committee of four members is to be formed from the following individuals: John, Sarah, Mike, Lisa, and Tom. The selection criteria are: 1) John and Sarah cannot be on the committee together. 2) If Mike is selected, Lisa cannot be selected. 3) Tom must be included if Lisa is included. Which of the following combinations meets these criteria?