Number Theory - II

If it is already 6 o'clock, what time would it be after 17 hours?

• 9:00

• 10:00

• 11:00

• 12:00

Using the assigned number of day,

(0=Sunday, 1=Monday, 2=Tuseday, 3=Wednesday, 4=Thursday, 5=Friday, 6=Saturday)

If today is Monday, what day would it be after 25 days?

• Thursday

• Friday

• Saturday

• Sunday

Evaluate (35+62) mod 13

• (35+62) mod 13=7

• (35+62) mod 13=10

• (35+62) mod 13=13

• (35+62) mod 13=6

Evaluate (74-25) mod 8

• (74-25) mod 8=1

• (74-25) mod 8=6

• (74-25) mod 8=3

• (74-25) mod 8=8

Evaluate (14*20) mod 9

• (14•20) mod 9=31

• (14•20) mod 9=11

• (14•20) mod 9=3

• (14•20) mod 9=1

In mod 11 arithmetic, find the possible multiplicative inverse of 3.

• 4

• 8

• 5

• 2

4 x 2 x 3 mod 11

• 2
• 3

• 4

• 5

What is the result of (8 ÷ 3) mod 5?

• 1

• 2

• 3

• not defined

What is the result of (10 ÷ 4) mod 7?

• 5

• 3

• 6

• 1

What is the solution to the system:
x ≡ 2 (mod 3),
x ≡ 3 (mod 5)?

• 7

• 8

• 13

• 17