163270

TASK 1 :
• 3 o’clock
• 1 o’clock
• 7 o’clock
• 1 o’clock
• 2 o’clock

TASK 2
• 5 mod 7
• 0 mod 7
• 5 mod 7
• 1 mod 7
• 2 mod 7
TASK 3
• 4 mod 7
• 6 mod 7
TASK 4
• +6
• +4
• +2
• +1
TASK 5
• 20≡ 6 mod 7
• 32≡ 4 mod 7
• 50≡ 1 mod 7
• 91≡ 0 mod 7
If x≡3 mod 7 then x could be ...10,17,24,31...73...1403...777780...
In general 7n+3.

If x≡a mod 7 then x=7n+a.

TASK 6
• Thursday
• Saturday
• Sunday
• Tuesday