# Solve a variety of problems involving duration, including where times are expressed in 12-hour and 24-hour notation, that require the use of mixed units (years, months, days, hours and/or minutes)

 1 Here a fraction there a fraction: Calculate a fraction of a quantity, then a fraction of the fraction. 2 Chicken Rules, OK? - Derive and solve an algebraic expression 3 Chicken Rules, OK? - Derive and solve an algebraic expression 4 It's A Bug's Life - 17 years after 2004 5 The wheels on the bus... 2 - read timetable and calculate duration 6 The Bear Facts 2 - calculate duration of hibernation in days 7 Commuter Tutor - calculate arrival times 8 Rush Hour - complete timetable given trip and wait times 9 A Breath of Fresh Air - number of 15 minute intervals in one day 10 Travel Time 5 - calculate time between 08:45 and 14:35 11 Early To Bed, Early To Rise - calculate duration of night 12 Race Against Time 1 - calculate duration in hours and minutes 13 Fishy Business 3 - calculate time of concurrent events 14 Lunar Ticks 1 - lunar months and years 15 Goal Posts Bus Service Timetable 2 - calculate total time spent over 12 months 16 Goal Posts Bus Service Timetable 1 - calculate total time spent over 12 months 17 Race Against Time 2 - calculate duration in hours and minutes 18 The Bear Facts 3 - quadrennium, years, days 19 Baby Boom - 336 days after Jan 1st 20 Rev It Up - calculate time in hours and minutes from RPM 21 Lunar Ticks 6 - astronomical time units, saros 22 In The Blink Of An Eye 2 - metric time; metric hours, beats and blinks 23 Pumping Maths - time to fill fuel tank given rate 24 The Sanders Family Pool! - time taken to fill pool from 40000L to 43000L 25 The Sanders Family Pool! - time taken to fill 43000L pool at 20.5L/min 26 The Sanders Family Pool! - time taken to fill pool from 40000L to 43000L 27 A Bright Spark - standard deviation