Modular arithmetic

Question 1 of 10

In modulo 4, 3 × 3 equals

Question 2 of 10

The multiplicative inverse of 3 in modulo 5 is

Question 3 of 10

(a) Construct the multiplication table for modulo 7. (b) Use it to find the multiplicative inverse of 2. (c) Solve 2x ≡ 1 (mod 7).

Question 4 of 10

Evaluate 9 + 15 (mod 8).

Question 5 of 10

40 (mod 5) = ___

Question 6 of 10

In modulo 4, 2 has a multiplicative inverse.

Question 7 of 10

The additive inverse of 2 in modulo 5 is

Question 8 of 10

(a) Construct the multiplication table for modulo 7. (b) Use it to find the multiplicative inverse of 4. (c) Solve 4x ≡ 1 (mod 7).

Question 9 of 10

20 (mod 5) = ___

Question 10 of 10

In a 12-hour clock, 9 hours after 8 o'clock is