What is the average of all numbers between 1000 and 1300 that are divisible by 25?
Show answer & explanation
Correct answer: A
Explanation
Numbers divisible by 25 between 1000 and 1300:
1000, 1025, 1050, ..., 1300
This forms an Arithmetic Progression (AP) with first term = 1000, last term = 1300.
Average of an AP = (First term + Last term) / 2
Average = (1000 + 1300) / 2 = 2300 / 2 = 1150