Page 148 - NUMINO Challenge_M2

123456789 24
1123456 28 35 42
2 2 4 6 8 10 12
3 3 6 9 12 15 18 40
4 4 8 12 16 20 24 54 63
5 5 10 15 20 25 30
6 6 12 18 24 30 36
7 28 A B
8C
9D

A: 7^5=35, B: 7^6=42, C: 8^5=40, D: 9^6=54

The bus numbers follow the rules given below:
The first letter is the letter of the departure city.
When there isn't a stopover, the second letter is the letter of the

arrival city.
When there is a stopover, the second letter is the letter of the

stopover city and the third letter is the letter of the arrival city.
A '-' follows the letters, and the numbers to the right are the 4 digits
of the departure time.
A bus that departs from F at 12 pm and stops over at A before arriving
to B has FAB-1200 as the bus number.

Charles trip can be found by looking at the bus schedules he picked up

AF AFG-0700 Going from A to F to G
E GD-1000 Going from G to D
CB-1200 Going from C to B
B BA-0330 Going from B to A
D

CG

In order for Charles to leave from A and come all the way back to A, he
needs a bus from D to C. Since this schedule doesn’t involve a
stopover, the bus schedule that Charles needs to buy has two letters.
The two letters of the bus schedule he needs are DC.

11Answer Key