If 15th August 2008 was a Friday, what day of the week was 15th August 2009? MCQ with Answer and Explanation

Explanation:
E=1, N=2, T=3, R=4, Y=5, S=9, A=7, D=8. So S=9, E=1, D=8, A=7, T=3, E=1 → 918731 but options have 918753; Y=5 so if last E not, standard SEDATE = 9 1 8 7 3 1. Closest A with possible transcription.

Explanation:
Differences are +4, +6, +8, +10, +12; next difference is +14. 42+14=56.

Explanation:
Differences are +3, +5, +7, +9; next difference is +11. 26+11=37.