Answers

2015-12-02T18:33:32+05:30
I just know the answer for 21st
ratio of forks to knifes is 8:10 
no. of forks is 16
⇒8/10 = 16/x (if x = to the no. of knifes)
⇒x=16*10/8
⇒x=2*10
⇒x=20.
∴ there are 20 knifes
0
Thanks Bjahnavi for your help
ur welcom
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2015-12-03T14:32:54+05:30
Rest are correct , For remaining two See attachment :)
2 5 2