Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Given that n is an integer, is n — 1 divisible by 3? (1) n^2+n is not divisible by 3 (2)3n+5>=k+8 , where k is a positive multiple of 3
Stmtn 1 . n(n+1) is not divisible by 3 . Means neither n nor n+1 is divisible by 3.
That definitely means n-1 is divisble by 3.
You take any number for n and n+1 that is not divisible by 3. You will find n-1 is divisible by 3.
Stmtn2 3n -3 >= k
3(n-1) <= 3a ---> n-1 <= 1 . Takes you no where.