book Maths Puzzle Numerical Ability

7. Evaluate 3/4 times 6 /7and reduce to simplest form.

A) 18/28 B) 1 C) 3/7 D) 9/14

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book Other Question

Hassan invested $7000 for one year. He invested part of it in a high-risk fund the pay 7% interst.At the endof one year he earned $ 730 in simple interst. How much did he invest in I NEED TO SET UP AN EQUATION FOR THIS WORD PROBLEM:
THE SUM OF TWO NUMBERS IS 18. THREE TIMES THE GREATER NUMBER EXCEEDS FOUR TIMES THE SMALLER NUMBER BY 5. FIND THE NUMBERS.