Class 10 Maths11)\(LCM \ of \ (2^3 × 3 × 5) \ and \ (2^4 × 5 × 7) \ is\)
1680
LCM = Product of greatest power of each prime factor involved in the numbers
\(= 2^4 × 3 × 5 × 7
= 16 × 3 × 5 × 7
= 1680\)
Class 10 Maths12)A rational number can be expressed as a terminating decimal if the denominator has the factors
2 or 5 only
A rational number can be expressed as a terminating decimal if the denominator has the factors 2 or 5 or both. Any other factors in the denominator yield a non-terminating decimal expansion.