exam Maths Puzzle Numerical Ability

2 triangles are similar
Triangle RTS where rt=4.2 and st=6.0 do not know rs
Triangle JLK where lk=8

what is the length of JL

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exam Other Question

(t+2)/t + 3/(t+1) =?
I cannot remember what to do for the first step please help.
Can someone help me on this problem?

Can you help me list the factors of the number 27.
Thanks,
Sher