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:
If \(@x\) is the number of distinct positive divisors of \(x\) , what is the value of \(@@90\) ?
a)3 b)4 c)5 d)6 e)7
Kindly explain. Thank you!
@@90 means that you have to find first the number of divisors of 90 ( @90). You can easily find that they are 12. Then find the divisor of 12 because @@90 is like @(@90) thus @12. The divisor of 12 are 1,2,3,4,6,12 therefore the right answer is d,6.