MCQ
$20$ is written as the product of primes as:
- A$2 \times 5$
- B$2 \times 2 \times 3 \times 5$
- ✓$2 \times 2 \times 5$
- D$2 \times 2 \times 3$
To write a number as product of its primes, we divide it by various prime numbers $2, 3, 5, 7$ etc one by one and check by which prime numbers it is divisible with and how many times.
Hence, $20 = 2 \times 10 = 2 \times 2 \times 5$
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