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There are four prime numbers written in ascending order. The product of the first three is 1001 and that of the last three is 2431. The last number is: 

(A) 17 

(B) 19 

(C) 23 

(D) 13

1 Answer

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Best answer

(A) 17

1001 = 7 x 11 x 13 

2431 = 11 x 13 x 17

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