# Step 4

Difficulty 4

 1 Fishy Business 3 - calculate time of concurrent events 2 Lunar Ticks 4 - Callipic cycles, Metatonic cycles and years 3 It's Astronomical! 2 - kiloyears and galactic years, scientific notation 4 It's Astronomical! 1 - kiloyears and galactic years, scientific notation 5 The Way Things Used To Be 2 - Hebrew time units, heleks 6 Wait a Moment 5 - medieval time units, ounces and moments 7 Wait a Moment 4 - medieval time units, ounces and moments 8 The Great Paschal Period - solar and lunar cycles 9 Lunar Ticks 8 - Metoni, Callipic and Hipparchic cycles 10 Go Take A Leap 3 - days in 97 leap years 11 Lunar Ticks 7 - lunar months, years and octennium 12 Lunar Ticks 5 - lunar months and years 13 In The Blink Of An Eye 2 - metric time; metric hours, beats and blinks 14 In The Blink Of An Eye 1 - metric time; metric hours, beats and blinks 15 Betty's Bricks - calculate volume of 1 brick in cubic cm and 1 pallet of bricks in cubic m 16 Clive's Concrete Calculations - create expression to calculate volume of given block 17 Uncle Max's Organic Orange Juice - calculate capacity in L given dimensions of carton 18 Blocks With Bob - volume of prism made from triangle shape 19 Lord Daniel - number of blocks used in castle 20 Blocks With Bob - volume of prism made from cross shape 21 Solving Spheres - volume of a sphere 22 Solving Spheres - volume of a sphere 23 Puzzling Pyramids - volume of a square pyramid 24 Phil's Pool Pondering - calculate volume of water to fill trapazoidal pool safely 25 Karl's Conical Calculations - volume of a cone 26 Phil's Pool Pondering - calculate volume of water to fill trapazoidal pool safely 27 Phil's Pool Pondering - calculate volume of water to fill pool safely 28 Karl's Conical Calculations- volume of a cone 29 Bored Blocks - calculate volume of square block with cylindrical hole, then calculate cost 30 Phil's Pool Pondering - calculate maximum capacity of hexagonal play pool 31 Barry's Basketball - calculate capacity of sphere 32 Capacity To the Max - calculations using engine capacity formula 33 Capacity To the Max - calculate engine capacity given formula 34 Damming Evidence - converting L/min to kL/hour 35 Tricky Triangles - complete expressions for area of rectangle and triangle 36 Completely Unique! - area of a circle 37 Roxie and Ronnie's Round Up - area of a square inside a circle 38 Roxie and Ronnie's Round Up - area of square in a circle 39 A Bit Of Wheel Work - area of a circle 40 Heron's Formula - area of triangle using Heron's formula 41 Damming Evidence - estimate area of irregular shape 42 Damming Evidence - estimate area of irregular shape 43 Fracturing the Compounds - area of cross-section, rectangle and quadrant 44 Cylinder-ella - surface area of a cylinder 45 No Sphere - surface area of a sphere 46 Kite Capers - area of a kite 47 The Flying Trapezium - area of trapezium, square cm 48 Heron's Formula - area of triangle using Heron's formula 49 A Conversions Experience - from square mm to square cm, 1 decimal place 50 Turf It - area of rectangle in hectares, dimensions in m 51 Bovine Delinquent Disease - calculate missing side length of rectangle given area, m and hectares 52 Netscape - select correct net, caluclate surface area, triangular prism 53 The Flying Frenchman - calculate number of wheel rotations given length of journey and wheel diameter 54 What's In The Box? - perimeter of a rectangle; Pythagoras 55 Conductor Chris and the Broadsands Flyer - calculate speed required to meet shedule 56 Micro Measuring - microns from m to cm 57 The Disorient Express 2 - calculate distance given speed and time 58 Rule The World 20 - cm to mcm 59 The Featherweight Division - mass in kg, multiples, scientific notation 60 The Featherweight Division - adding and subtracting mass in g, express answer in kg using scientific notation 61 The Featherweight Division - mass in kg, multiples, scientific notation 62 The Featherweight Division - mass in kg, multiples, scientific notation 63 Moon-Light? - mass in kg, multiples, scientific notation 64 Heavy Maths - mass in kg, multiples, scientific notation 65 Moon-Light? - combined mass, kg, scientific notation 66 Rob's Shed - calculate mass, quantity and cost