Number 1 and 2

Number 1 and 2

1. LCM

   • Lowest Common Multiple

2. HCF

   • Highest Common Factor

3. Working out %s

   • e.g 7% = 7/100
   • 7% = 0.07
   • Increasing %
     • e.g increase by 35%
       • n x 1.35
       • n x 135/100
   • Decreasing %
     • e.g decrease by 35%
       • n x 0.65
       • n x 65/100
   • Compound Interest
     • 10% interest every year, after 10 years?
       • 1.10^10

4. Standard Form

   • Form is ALWAYS
     • a x 10^n
       • a =< 1 < 10
   • e.g 6.6 x 10^5
     • 660000
   • e.g 6.6 x 10^-5
     • 0.000066
   • Useful Formulas
     • Mass = Density x Volume
     • Distance = Speed x Time

5. Lower and Upper Bounds

   • e.g 14mm
     • Upper Bound = 14.499mm
       • We say the upper bound is 14.5mm
     • Lower Bound = 13.5mm