how many positive integers less than 100 are neither multiples of 2 or 5 .
"to answer this q we require to know 1 ) multiples of 2 till 100 = 100 / 2 = 50 2 ) multiples of 5 till 100 = 100 / 5 = 20 add the two 50 + 20 = 70 ; subtract common terms that are multiple of both 2 and 5 . . lcm of 2 and 5 = 10 multiples of 10 till 100 = 100 / 10 = 10 so total multiples of 2 and 5 = 70 - 10 = 6 ans = 100 - 60 = 40 c"
divide(factorial(subtract(add(const_4, 2), const_1)), multiply(factorial(2), factorial(subtract(const_4, const_1))))