1. Array Formulas 1950s map of lower Manhattan1950s map of lower Manhattan by Whitewall Buick CC-BY-2.0Whitewall BuickCC-BY-2.0

2. Analyze quality of exam questions MAGNIFYING GLASSMAGNIFYING GLASS by andercismo CC-BY-NC-SA-2.0andercismoCC-BY-NC-SA-2.0

6. Array Formulas 1950s map of lower Manhattan1950s map of lower Manhattan by Whitewall Buick CC-BY-2.0Whitewall BuickCC-BY-2.0 Some formulas are ‘array’ (TRANSPOSE)

7. Array Formulas 1950s map of lower Manhattan1950s map of lower Manhattan by Whitewall Buick CC-BY-2.0Whitewall BuickCC-BY-2.0 Some formulas are ‘array’ (TRANSPOSE) Some formulas can behave like ‘array’ (-)