book Maths Puzzle Numerical Ability

Five times a number subtracted from 3 times the number equals 20. Find the number.

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book Other Question

You receive $5000. you decide to invest the money in a one-year bond paying 2% interest and in a one year bond certificate of deposit paying 6 % interest. If you invest $2000 in o (1) find the exact value of sec(225degrees)



(2) In the triangle ABC, find A, if B= 100 degrees, and a=20.


(3) In the triangle ABC, find b, iF A=15, C=12 and angle b=150 degrees.