What is the sum of the sequence: 2+4+6+ ….. +98+100 = ?

(A) 2440
(B) 2550
(C) 2650
(D) 2700

Answer: (B) 2550

Explanation: This is an arithmetic sequence with common difference of 2. The first element is 2, the last element is 100, and total elements (from 2 to 100) are 50. So, a1 = 2, an = 100, d = 2 and n = 50. So, by using the formula for the sum of n elements of an arithmetic sequence, we have

In the result of climate change the hottest month ever recorded on earth:

(A) June 2022
(B) July 2022
(C) June 2023
(D) July 2023

Answer: (D) July 2023
July 2023 was the hottest month ever recorded, and climate change made the elevated temperatures across 51 percent of Earth’s land surface at least five times more likely, according to a study released August 2 by Climate Central.