If HINDU is coded as 61257, and MAN is coded as 924, then INDIRA will be coded as -
N is common to HINDU and MAN, so N = 2. INDIRA has two I, which is common with HINDU. So INDIRA should contain 2 + one of (6,1,5,7) repeated twice. A in INDIRA is common with MAN, so INDIRA should contain 2 + one of (6,1,5,7) repeated twice + one and only one of (9, 4). We can see that only 452787 passes the test so far. So it is the answer.