Junior high school math formula list for topnotch high school's passes: Do you answer in 10 seconds?

formula1　　 Calculation of ○5×○5 formula2　　 ○4×○6/○3×○7/○2×○8/○1×○9 formula3　　 "the length of one side except for rectangular triangle's hypotenuse" formula4　　 How to identify multiples formula5　　 arithmetic progression's term formula6　　 arithmetic progression's sum formula7　　 the product's end"0" of natural number formula8　　 the number of aliquot formula9　　 aliquot's sum formula10 LCM,GCD formula11 circulator formula12 the rationalization of a denominator formula13 double root sign formula14 expansion formula15 "quadratic formula in case of x's coefficient is even integer" formula16 the relation between solution and coefficien formula17 the number of solution is one formula18 the area of the triangle containing the origin formula19 the area of triangle formula20 internally dividing point formula21 externally dividing point formula22 barycenter formula23 incenter formula24 circumcenter formula25 shortest distance from a point on the X axis formula26 shortest distance from a point on the Y axis formula27 expression of line through one point formula28 slope of two vertical lines formula29 two exact halves of square's area formula30 distance between a point and a line formula31 rate of change formula32 line's slope that intersects quadratic function formula33 parallel straight line crossed quadratic function formula34 Area of triangle on quadratic function formula35 "interior angles' sum and exterior angles' sum of n square shape" formula36 the sum of star's angles formula37 Dented square shape's angle formula38 "angle made in triangle and angle bisector, inner center" formula39 regular triangle formula40 Heron's formula formula41 Brahmagupta's formula formula42 the ratio of inscribed quadrangle's area formula43 Bicentric Quadrilateral's area formula44 Area's ratio when triangle is plyed formula45 bisector of triangle's interior angle formula46 bisector of triangle's exterior angle formula48 "parallel line１of trapezoid's upper base and lower base" formula49 "parallel line2of trapezoid's upper base and lower base" formula50 the ratio of trapezoid's area formula51 the ratio of square's area formula52 Pythagorean number formula53 rectangular triangle's confirmation formula54 the triangle that two angles are 75°and 30° formula55 the triangle that two angles are 75°and 60° formula56 the triangle that two angles are 105°and 30° formula57 right triangle' area of 15°,75°,90° formula58 Archesta's theorem formula59 harmonic mean formula60 diagonal line of regular pentagon formula61 parallelogram formula62 Menelaus's theorem formula63 Ceva's theorem formula64 Pappus's theorem formula65 Stuart's theorem formula67 Ptolemy's theorem formula68 Power of a point １ formula69 Power of a point 2 formula70 Power of a point 3 formula71 right triangle's inradius formula72 "an inscribed circle and the length of tangential line" formula73 triangle's area circum