Elitmus Exam Logical Reasoning Decision Making and Problem Solving

i rope is cut into 4 part and one part is of 3cm , then what is the size of smallest part
a) sum of first three part =11cm
b) sum of last three part =10 cm

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Elitmus Other Question

a and b are natural number , Is a>b??
a) 8-(a-b)^3 is positive
b) 4-(a-b)^2 is negative
can anyone tell me _ve marking scheme in elitmus .
if anyone solve 5 question out of which 3 correct and 2 wrong ,then for how many questions he get -0.5 ,for 1 question or two question