When the expression 10^2021− 2021 is evaluated, the result is a very large number. You probably do not have enough time to perform the calculation. So, in an effort to save you some time and paper, instead of evaluating the expression 102021 − 2021, determine the sum of the digits in the difference.

Is the figure congruent? yes or no?

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.

I’m still confused on how to work the percentages