NATS interview process

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Exam Cheat

Knots = miles per hour so you can interpret 40 knots as 40mph.
To convert minutes to hours , divide that number by 60.
To convert hours to minutes multiply that number by 60.
Interpret FL290 as 29000ft.

Descend rate is measured in ft per minute. You usually use descend rate to find time in minutes which need to be divided by 60 to convert it to hour in order to calculate distance if you know your speed limit.

Working in fractions is easier to compute mentally than working in decimals.
e.g (120 ÷18 ) * 36 = 240. Dividing 36 by 18 and multiply 120 by 2 will be faster to compute than if decide to divide 120 by 18 to multiply 36 by 6.66 mentally.
So watch your style or method.

Practice long division and times table especially 6 times because you are likely to divide a number by 60 when converting from minutes to hours.

If you encounter fraction in your test, think of what you want to do with the result if it is not your final answer, you may likely use the result to multiply another number, by bringing that number into the equation could simplify things. E.g

If you sell a packet of 20 smoke for 5.98 US dollars ,how much would you sell 2 smoke ?

Two ways to do this:
If you divide 5.98 by 20 to multiply the result by 2 will take longer to compute mentally than if you divide 5.98 by 10 = 0.598. because 20 divide by 2 is 10.

( 5.98/20 ) * 2 = 0.598

therefore you can buy two smoke for 59.8 cent.

If you want to divide a number by a fraction, is the same as to multiply that number by inverse of the fraction.
e.g
450 ÷ 1.5 is equal to 450 ÷ 3/2, however if you do 450*2/3, you can quickly see that 450/3 is 150 and if you multiply 150 by 2 you get 300.