KVPY2015MathematicsPermutation and Combination
The number of distinct primes dividing 12 !+13 !+14 ! is
Options
- A5
- B6
- C7
- D8
Correct answer
A. 5
Step-by-step solution
array l 121 !+131 !+141 ! 121 !(1+13+14 13) 121 196 array Which is only divided by possible distinct primes 2,3,5,7,11