todo.md

UNIT 3: 1.GCD ✔ 2.FACTORIAL ✔ 3.QUOTIENT AND REMAINDER ✔ 4.LCM ✔ 5.NO. OF PRIMES ✔ 6.TRAILING ZEROES ✔

UNIT 4: 1.EXPONENT DIVISION ✔ 2.INVERSE MODULO ✔ 3.DIVISIBLITY CHECK ✔

UNIT 5: 1.SIGMA ✔ 2.TAU ✔ 3.PHI ✔ 4.FACTORIAL DIVISION