book Maths Puzzle Numerical Ability

An experienced carpenter can panel a room 3 times faster than an apprentice can. Working together they can panel the room in 6 hours. How long would it take each one working alone to do the job?

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May I get some help with this please?:
A bank loaned out $120,000, part of it at the rate of 8% annual mortgage interest and the rest at the rate of 18% annual credit card interes i know conners age but i dont really know how to make this question an equation

Nathan has two brothers, Conner and Josh. If we add 2 to Conner�s age, it is exactly � the age of their older brother Josh, who is 12. How old is Conner?