Page 49 - Cybersecurity Career Guide for Alexandria College
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7. 8.
You are a bus driver. At the first stop of the day, eight people get on board. At the second stop, four get off, and eleven get on. At the third stop, two get off, and six get on. At the fourth stop, 13 get off, and one gets on. At the fifth stop, five get off, and three get on. At the sixth stop, three get off, and two get on. What color are the bus driver’s eyes? _
A certain five-letter word becomes shorter when you add two letters to it. What is the word? _ Some months have 30 days. Some have 31. How many months have 28 days? _
Attention to Detail
9. In a computer program, valid combinations of data are five characters long and start with a letter and finish with a letter. In between, numbers or letters may be used. Identify which block below contains a violation of this pattern.
Line 1: A123B C546D m874A P461N M938A v847F Line 2: x82aC D546j z834A 7421N y935B k142q Line 3: A123B Ca46D m474A P411N Mj38A v8b7F Line 4: x82aC D566j z8f4A h4x1N y93aB k122q
10. On a network, each computer has a special address called an IP address. In IPv4, the addresses must take the form [0-255].[0-255].[0-255].[0-255]. A valid IPv4 address, for example, is ‘’. Look at the blocks of IP addresses below. Which block, if any, contains an invalid IP address?
Block 1
Block 2
Block 3
Block 4
1) 5. The outside numbers, taken as sums, add up to the inside num-
bers; 3 + 2 and 1 + 4 both equal 5.
2) 6. The digits of one number, multiplied together, generate the next number; 1 x 6 = 6.
3) 293, 031. Seeing the sequence as two-digit numbers, rather than three-digit numbers, reveals it as 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31.
4) foot; slow; cheese;
5) ar; ho; is; wo; ed
6) “You are a bus driver.” The driver’s eye color is the color of whoever
“you” is.
7) Short. Adding two letters – er – turns it into “shorter.”
8) All months have 28 days. Some months have more, in varying amounts.
9) Line 2 (7421N is the violation)
10) Block 2 ( is the violation)

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