- #1

- 16

- 0

## Main Question or Discussion Point

hi, this is me again.i was wondering if you could teach me how to do these 2 questions (???) means to the power of

1)a)find the remainder when 7(100) (I.E 7 TO THE POWER OF 100) is divided to the power of 25( i know that you are supposed to use mod10 or mod25 or something, but i don't know how to use ,modulus)

b)Find the remainder when 2(603) X 3(201) is divided by 25

c)hence show that 29 X 7(100) + 54 X 2(603) X 3(201) is divisible by 25

2. Two cars left towns A and C at the same time to drive to the other town, passing each other at B and both travelling at different constant speeds, The car from A travels 20km/h faster than the car from C. The distance from A to B is 10km more than the distance from C to B. The car from C completed the journey from B to A in 35 minutes. Find the distance from A to C

so, A-----------------------------B----------------------------C

x + 10 km x km

1)a)find the remainder when 7(100) (I.E 7 TO THE POWER OF 100) is divided to the power of 25( i know that you are supposed to use mod10 or mod25 or something, but i don't know how to use ,modulus)

b)Find the remainder when 2(603) X 3(201) is divided by 25

c)hence show that 29 X 7(100) + 54 X 2(603) X 3(201) is divisible by 25

2. Two cars left towns A and C at the same time to drive to the other town, passing each other at B and both travelling at different constant speeds, The car from A travels 20km/h faster than the car from C. The distance from A to B is 10km more than the distance from C to B. The car from C completed the journey from B to A in 35 minutes. Find the distance from A to C

so, A-----------------------------B----------------------------C

x + 10 km x km