Number System Practice Test 3

Question : 24 of 40

Marks: +1, -0

a + b + c + d is a positive number, a minimum of ‘x’ of the number a, b, c and d must be positive, where ‘x’ is equal to—

Solution:

If all numbers were not positive, then the sum could not be positive. If

a, b, c

were all

–1

and

d

were

5

, then a + b + c + d would be positive, so (b), (c), (d) are incorrect.

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