exam Maths Puzzle Numerical Ability

solve liner equation: 2x+6=10x+6

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exam Other Question

solve x^2-28=0
X^2=28
X=2*squreroot 7
x=-5.291, +5.291 For the 20 test scores shown, find the percentile rank for a score of 86.
75
63
92
74
86
50
77
82
98
65
71
89
75
66
87
59
70
83
91
73
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