RRB NTPC Prelims Model Paper 14 with solutions

Directions (90‐92):

The following questions are based on the five three digit numbers given below:
972 526 487 359 251

Question : 92 of 100

Marks: +1, -0

If 1 is subtracted from the last digit of each of the above numbers the sum of the digitsof how many of them are prime numbers?

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