ATSA Numerical Memory and Differences 5 — Questions and Answers
Question 1: A controller remembers six aircraft altitudes: 7,000; 9,000; 8,500; 10,000; 6,500; 11,000. How many are above 8,000 ft?
- 2
- 3 (Correct answer)
- 4
- 5
Correct answer: 3
Altitudes above 8,000 ft: 9,000; 8,500; 10,000; 11,000 — that is 4 aircraft.
Question 2: A number string 74836 is shown. What is the product of the first digit and the last digit?
- 21
- 28 (Correct answer)
- 35
- 42
Correct answer: 28
First digit is 7 and last digit is 6; 7 × 6 = 42.
Question 3: Two aircraft are separated by 30 nautical miles. Aircraft A is traveling at 450 knots toward Aircraft B, which is stationary. In how many minutes will they be 15 nm apart?
- 1 min
- 2 min (Correct answer)
- 3 min
- 4 min
Correct answer: 2 min
At 450 knots, 15 nm is covered in 15/450 × 60 = 2 minutes.
Question 4: You are given four codes to remember: 3315, 3351, 3135, 3153. Which code has the digit 5 in position 3?
- 3315
- 3351 (Correct answer)
- 3135
- 3153
Correct answer: 3351
In 3351, the digits are 3,3,5,1 — position 3 is 5.
Question 5: An aircraft's altitude readout changes from 35,000 ft to 34,700 ft. What is the magnitude of the change?
- 200 ft
- 300 ft (Correct answer)
- 400 ft
- 500 ft
Correct answer: 300 ft
35,000 minus 34,700 equals 300 feet.
Question 6: A strip shows four different runway headings: 090°, 270°, 180°, 360°. Which two headings are reciprocals of each other — i.e., differ by exactly 180°?
- 090° and 180°
- 090° and 270° (Correct answer)
- 180° and 360°
- 270° and 360°
Correct answer: 090° and 270°
090° and 270° differ by exactly 180°, making them reciprocal runway headings.
Question 7: A sequence of beacon codes is transmitted: 1276, 1267, 1726, 1762. Which code is an exact reversal (mirror) of 2671?
- 1276
- 1267 (Correct answer)
- 1726
- 1762
Correct answer: 1267
Reversing 2671 gives 1762; however 1267 reversed is 7621 — the exact reversal of 2671 is 1762.
ATSA Numerical Memory and Differences 5
A controller remembers six aircraft altitudes: 7,000; 9,000; 8,500; 10,000; 6,500; 11,000.
How many are above 8,000 ft?