Question

The sum of all natural numbers from 75 to 97 is:

• A. 1598
• B. 1798
• C. 1958
• D. 1978

Answer 1

Answer:

D. 1978

Sum of 'n' natural numbers = n(n+1)/2 =97(97+1)/2 - 74(74+1)/2 =(97*98)/2 - (74*75)/2 =4753-2775 =1978