Influx Building Technologies interview questions

In addition to the typical questions about your past experiences, reasons you left previous employer, identification of your strengths and weaknesses, and describing how you managed receiving critical feedback on a task, you will be asked to demonstrate your ability to solve basic high school level questions under pressure. For example these are the questions I was asked: "You are planning a party for a friends birthday and you want to buy enough snacks for the guests. You estimate that each guest will eat 3 snacks on average during the party. If you expect 20 guests to attend and wants to have an extra 10% of snacks as a buffer, how many snacks should you buy in total?" or "Mike is a contractor tasked with building a rectangular garden with a length of 12 feet and a width of 8 feet. He plans to place paving stones along the perimeter of the garden. If each paving stone measures 1 foot by 1 foot, how many paving stones will Mike need to complete the project?"