QUESTÕES ENEM #4 - RACIOCÍNIO LÓGICO NO ENEM!!

Subscribe to the channel, activate the bell, and ask me your questions! =D Playlist ENEM Questions:    • ENEM   PDF Sheet: https://drive.google.com/file/d/1IciT... ENEM Questions 4 1. Some car radio models are protected by a security code. To activate the audio system, the secret code, composed of four digits, must be entered. In the first case of a typing error, the person must wait 60 seconds to enter the code again. The waiting time doubles, in relation to the previous waiting time, with each incorrect entry. A person managed to activate the radio only on the fourth attempt, with 30 seconds spent typing the secret code on each attempt. 1. In cases of incorrect typing, she started the new attempt immediately after the waiting system was released. The total time, in seconds, spent by this person to activate the radio was equal to: a) 300 b) 420 c) 540 d) 660 e) 1020 2. The organizing committee of the 2014 World Cup created the Cup's logo, composed of a flat figure and the slogan "Together in one rhythm," with hands joining to form the FIFA trophy. Consider that the organizing committee decided to use all the colors of the national flag (green, yellow, blue, and white) to color the logo, so that neighboring regions have different colors. In how many different ways could the organizing committee paint the logo with the colors mentioned? a) 15 b) 30 c) 108 d) 360 e) 972 3. The graph below shows the monthly evolution of sales of a certain product from July to November 2011. It is known that July was the worst month for the company in 2011 and that the number of units sold of this product in December 2011 was equal to the arithmetic mean of the number of units sold in the months from July to November of the same year. The sales manager said, in a board meeting, that if this reduction in the number of units sold from November to December 2011 remained constant in subsequent months, sales would only become worse than July 2011 at the end of 2012. The financial director immediately countered this argument, showing that, if the trend continued, this would happen in: a) January b) February c) March d) April e) May