Sarthaks Test
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If N is the number of positive integral solution of x1 x2 x3 x4 = 770, then the value of N is _______

(a) 250 

(b) 252 

(c) 254 

(d) 256

1 Answer

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Best answer

Correct option: (d) 256

Explanation:

770 = 2 x 5 x 7 x 11

2 can be put in 4 ways

5 can be put in 4 ways

7 can be put in 4 ways

11 can be put in 4 ways

Number of ways of solution = N = 44 = 256

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