self Maths Puzzle

A number when divided by 11 leaves a remainder of 3. A second number when divided by 11 leaves a remainder of 5. Another number when divided by 11 leaves a remainder of 6.

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self Other Question

At 8am a truck travelling at 60km/h was 3 km behind a bus. At 8:45am, the truck was 12km ahead of the bus. find the speed of the bus(in kmph) 1 of the two students,while solving Q.E in x,copied the constant term incorrectly and got the roots 3 and 2.The other copied the constant term and coefficient of x square correctly as -6 and 1 resp.The correct Roots are:
option
a. 3,-2
b. -3,2
c. -6,-1
d. 6,-1.