1. The key to success in GCSE maths

2. Examiners estimate that candidates who show working out get 10% more marks than those who don’t.

18. min £ m2m2 cm 3 kgml km CC

25. 22.455 = 22.5 to 1d.p.

29. 3.14159265358979323846264338327950288419716939937510582 097494459230781640628620899862803482534211706798214808 6513282306647093844609550582231725359408128481117450284 1027019385211055596446229489549303819644288109756659334 4612847564823378678316527120190914564856692346034861045 4326648213393607260249141273724587006606315588174881520 920962829254091715364367892590360011330530548820466521 38414695194151160943305727036575959195309218611738193261 1793105118548074462379962749567351885752724891227938183 0119491298336733624406566430860213949463952247371907021 798609437027705392171762931767523846748184676694051323 0005681271452635608277857713427577896091736371787214684 4090122495343014654958537105079227968925892354201995611 2129021960864034418159813629774771309960518707211349999 998372978049951059731732816096318595024459455346908302 6425223082533446850352619311881710100031378387528865875 3320838142061717766914730359825349042875546873115956286 3882353787593751957781857780532171226806613001927876611 1959092164201989380952572010654858632788659361533818279 682303019520353018529689957736225994138912497217752834

32. 

34. Examiners estimate that candidates who show working out get 10% more marks than those who don’t.