How many factors of 24 × 35 × 104 are perfect squares which are greater than 1?
Explanation:
N = 24 × 35 × 104 = 24 × 35 × 24 × 54 = 28 × 35 × 54
Now, for any number to be a perfect square, it must have even powers.
So, if we consider 28, only powers of 0, 2, 4, 6, 8 can lead to perfect squares i.e. 5 ways
Now,
If we consider 35, only powers of 0, 2, 4 can lead to perfect squares i.e. 3 ways
If we consider 54, only powers of 0, 2, 4 can lead to perfect squares i.e. 3 ways
So, total number of possibilities = 5 × 3 × 3 ways = 45 ways.
Since we need to find the number of factors greater than 1,
Required number of ways = 45 -1 = 44 ways
Hence, 44.
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