exam Maths Puzzle Numerical Ability

Pat and Chris always walk up the subway escalator while it is running. Pat climbs 20 steps at a constant pace, taking 60 seconds to reach the top, whereas Chris takes only 16 steps

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exam Other Question

simplify (3x+1)^2-(2x+1)(x-5)+2 and factorise the simplified expression!! help please...!! log3(x)+log3(x-1)+log3 6
x=

*3's are subscript