10, 15, 25, 35, 55, ?
Explanation:
Here each number is written as the product of 5 and a prime number i.e. 5 × 2, 5 × 3, 5 × 5, 5 × 7, 5 × 11 and so on.
So, the next term will be 5 × 13 = 65.
Hence, option (a).
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