Real Numbers

⭐ Important Questions

1. Express 140 as product of prime factors.
   Show Solution

   140 = 2² x 5 x 7
2. Check whether 6ⁿ can end with digit 0 for any natural number n.
   Show Solution

   If 6ⁿ ends with 0, it must be divisible by 5. But 6ⁿ = (2x3)ⁿ = 2ⁿ x 3ⁿ, which has only prime factors 2 and 3. No factor of 5, so never ends with 0.