Which of the following statement(s) is/are TRUE?
I. The total number of positive factors of 72 is 12.
II. The sum of first 20 odd numbers is 400.
III. Largest two digit prime number is 97.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4. (i.e. All are true)
1) 72 = 23 × 32 → Total positive factor = (3 + 1) (2 + 1) = 4 × 3 = 12 is true
2) Sum = 
= 400 → True
3) Largest two digit prime no. is 97 → True