Which among the following can be expressed as (10p+q) (10q+p), where p and q are integers?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 1729.
only number from the list that can be expressed as (10p + q)(10q + p) is:
Correct option: 1729
Because 19 × 91 = 1729 → Here, p = 1, q = 9
(10p + q) = 19, (10q + p) = 91