ATSA Numerical Memory and Differences 3 — Questions and Answers
Question 1: A controller is given the sequence: 7-4-9-2-6. What is the sum of the first and last digits?
- 9
- 11
- 13 (Correct answer)
- 15
Correct answer: 13
The first digit is 7 and the last digit is 6; 7 + 6 = 13.
Question 2: Two strips list altitudes of 11,000 ft and 9,000 ft. What is the vertical separation in feet?
- 1,000 ft
- 1,500 ft
- 2,000 ft (Correct answer)
- 3,000 ft
Correct answer: 2,000 ft
11,000 minus 9,000 equals 2,000 feet of vertical separation.
Question 3: A pilot reads back a clearance with altitude 14,500 ft, but the original was 15,400 ft. Which digits were transposed?
- The first two digits
- The middle two digits
- Digits 2 and 3 (tens of thousands and thousands)
- The last two digits (Correct answer)
Correct answer: The last two digits
14,500 vs 15,400 — the digits 4 and 5 in the hundreds and thousands places are swapped.
Question 4: You are shown the number string 836492 for five seconds, then asked: what is the digit in position 4?
- 4 (Correct answer)
- 6
- 9
- 3
Correct answer: 4
Position 4 in 836492 is the digit 4 (8=1, 3=2, 6=3, 4=4).
Question 5: An aircraft's beacon code list shows: 1200, 1300, 1400, 7700, 7600. Which code stands out as a special purpose emergency code?
- 1200
- 1300
- 7600
- 7700 (Correct answer)
Correct answer: 7700
Squawk 7700 is the general emergency code, making it the primary emergency standout.
Question 6: A sequence of times is given: 1423, 1347, 1512, 1438. Which time is the earliest?
- 1423
- 1347 (Correct answer)
- 1512
- 1438
Correct answer: 1347
1347 is the smallest number and therefore the earliest time.
Question 7: Two aircraft are at altitudes 22,000 ft and 24,000 ft. A third aircraft must maintain 1,000 ft above the lower and 1,000 ft below the higher. At what altitude must the third aircraft fly?
- 21,000 ft
- 22,500 ft
- 23,000 ft (Correct answer)
- 24,500 ft
Correct answer: 23,000 ft
1,000 ft above 22,000 ft is 23,000 ft, which is also 1,000 ft below 24,000 ft.
ATSA Numerical Memory and Differences 3
A controller is given the sequence: 7-4-9-2-6.
What is the sum of the first and last digits?