Yes, many servers are able to do mental math while waiting tables. It is a common skill that servers develop in order to quickly calculate totals, split bills, and make change for customers. This ability is especially important in fast-paced environments where servers need to keep track of multiple orders and transactions simultaneously. **

Yes, waiting can be contagious. When we see others waiting, it can influence our own behavior and make us more likely to wait as well. This is known as social influence, where we are influenced by the actions of those around us. For example, if we see a group of people waiting in line, we are more likely to join the line and wait as well. This can also be seen in situations where people are waiting for a response or decision, as the act of waiting can spread among a group of individuals. **

Waiting time refers to the amount of time a person has to wait before they can proceed with a certain task or activity. On the other hand, waiting semester specifically refers to the period of time a student has to wait before they can start a new semester or academic term. While waiting time can vary depending on the situation, waiting semester is a fixed period determined by the academic calendar of the institution. **

Memory is not intelligence in itself, but it is an important component of intelligence. Memory allows us to store and retrieve information, which is essential for learning, problem-solving, and decision-making. However, intelligence encompasses a broader range of cognitive abilities, including reasoning, problem-solving, and creativity, in addition to memory. While memory is an important aspect of intelligence, it is not the sole determinant of intelligence. **

Waiting snaps are a feature on Snapchat that allows users to send a photo or video to a friend, but the recipient can only view it once they open the chat. The snap will remain in a pending state until the recipient opens the chat, at which point the snap will be delivered. This feature adds an element of anticipation and surprise to the Snapchat experience. **

Yes, waiting semesters can expire depending on the specific rules and regulations of the institution or program. Some institutions may have a limit on how long a student can wait before re-enrolling, after which the waiting semester may expire. It is important for students to be aware of the policies regarding waiting semesters at their institution to avoid any issues with expiration. **

The correct expression is "waiting in vain." This phrase is used to describe a situation where someone is waiting for something that is unlikely to happen or will not happen at all. It conveys a sense of disappointment or frustration in waiting for something that is not going to materialize. **

Intelligence and photographic memory are two different cognitive abilities. Intelligence refers to the overall capacity for learning, reasoning, problem-solving, and adapting to new situations. Photographic memory, on the other hand, is the ability to recall images, sounds, or objects in great detail after only a brief exposure. While both can be beneficial in different ways, intelligence is generally considered to be a more valuable and versatile trait as it involves a broader range of cognitive skills beyond just memory. **