Question

pls answer this fast

Answer 1

(i) 21, gap between 1 and 3 is 2 ;gap between 3 and 6 is 4;and the gap between the another number will go on
(ii) 27, the gap between the 2 and 5 is 3;the gap between the 5 and 9 is 4 and the gap between the another number will go on
(iii)51, the gap between the 1 and 5 is 4;the gap between the 5 and 12 is 7 ; the gap between the is 3 when we add 2 in 7 it makes 10 the gap between the 12 and 22 is 10 and so on

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Answer 2

here is solution of your question
I 21
ii 27
iii 51