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past paper btana konsa pochna hai....

invar 12
s2011

Q9
Q18 b )
Q14 b )
Q20 b)
Q23 A ii)
????

ok..let c the last one first..23(a)(ii)4*35+(4*35)*20\100..

20(b)mean={(5*10)+(20*30)+(10*50)+(5*70)}\(5+20+10+5)

nae yr ans is 76.80

answer=37.5

thanku i got 20 b

ohk..i got it now...23(a)(ii)answer=(16*4)+49*16*20\100)

in 14(b)use the concept that all factor are considered in L.C.M. but those factors which are common to both numbers are taken in H.C.F...

how comes 49 ??

18(b)yhan pe SPQ ka angle bisector or line QR ka perpendicular bisector draw krna hai,neche corner wala area shade krna hai...ok?

ok !

thanku so much!

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