Kwa mageneus tuuu

Let think from second Qns
If we take first answer and add to second Qns can we obtain the same Qns?
Follow the steps
From 2nd Qn
Take 4 and add to next Qn
4+2+5=12
Take 12 and add to next
12+3+6=21
If 2nd and 3rd Qns went well therefore
Last Qns follow the same
Take 21 and add to last Qns
21+8+11=40
Hence 40 ans
 

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