exam Maths Puzzle Numerical Ability

(~(8))/(~4:(8)) need help PLEASE - need to put in simplest form

2~5:(4)*3~5:(56) need to put in simplest form - HELP!!!

~6:((1)/(3)) - same thing
THANKS

LLO

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exam Other Question

Three numbers are in the ratio 2:4:7. If the first number is multiplied by 4, the result is 9 less than the sum of the other two. find all three numbers. 6. Rationalize the denominator:
2____
√[3] + √[2]