What are the answers to the nrich secondary cipher challenge?

What do you mean by KPI? What is the analysis of divide by two by francisco arcellanas? What shape has 3 sides with 2 sides that have the same length? What is john venn full name? What goes into 100 5 times? What is the probability that two digit-cards and one face card of black suit is drawn? What is it called when two or more independent melodic lines are combined the resulting texture is called? What is 64 plus 26 equals? Common factors of 64 and 56? Is 16 cups greater than 1 gal? Which color shows maximum deviation? What is the probability of choosing a card that is not a ace but that is divisible by 2? Is 100 mm larger or smaller than 1 meter? What values can have different answers but are 1 or 2 apart? What is 2.99 as a percentage? How do you convert 37.5 degrees celsius to Fahrenheit? What is the square root 4900? Is 4x plus 12 and 4x plus 3 equal? Which type of objectives have angle of elevation? What is the answer to 12 plus 8x-12?