how many "D" are in the week days?

Grok 4.3

Answer: There are three instances of the letter D in the names of the seven days of the week.

The days of the week are Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday. Wednesday contains one D, Thursday contains one D, and Saturday contains one D, for a total of three. No other days include the letter D, whether counting uppercase or lowercase forms.

Gemini 3.5 Flash

Answer: There are 8 occurrences of the letter "D" (case-insensitive) in the names of the seven days of the week, or 6 if referring strictly to the five weekdays.

To find the number of times the letter "D" appears, we can look at the spelling of the days of the week. If we consider all seven days of the week (Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday): - Monday has 1 "d" - Tuesday has 1 "d" - Wednesday has 2 "d"s (We**d**nes**d**ay) - Thursday has 1 "d" - Friday has 1 "d" - Saturday has 1 "d" - Sunday has 1 "d" Summing these up (1 + 1 + 2 + 1 + 1 + 1 + 1) gives a total of 8. If the question specifically refers to "weekdays" (excluding the weekend days of Saturday and Sunday), we only count Monday through Friday: - Monday (1) - Tuesday (1) - Wednesday (2) - Thursday (1) - Friday (1) Summing these up gives a total of 6.

Claude Opus 4.7

Answer: There are 0 letter "D"s (uppercase) in the names of the days of the week, but there are 6 letter "d"s if we count lowercase as well.

The seven days of the week are: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday. If the question is taken strictly literally — counting only the uppercase letter "D" as written in quotes — there are 0 occurrences, since none of the day names contain an uppercase D (the D's that appear are all lowercase). However, the more natural interpretation is to count the letter D regardless of case. In that case: - Monday → 1 (d) - Tuesday → 1 (d) - Wednesday → 2 (d, d) - Thursday → 1 (d) - Friday → 1 (d) - Saturday → 0 - Sunday → 0 Total: 1 + 1 + 2 + 1 + 1 + 0 + 0 = 6 letter D's in the days of the week.

GPT-5.5

Answer: There are 8 “D” letters in the names of the weekdays if counting both uppercase and lowercase D/d.

The weekday names are Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday. Counting the letter D/d in each: Monday has 1, Tuesday has 1, Wednesday has 2, Thursday has 1, Friday has 1, Saturday has 1, and Sunday has 1. That totals 8. If you meant only the exact uppercase character “D”, then the count would be 0 in the usual spelling of the weekday names.

Final Summary

The AI Roundtable identified 8 "D"s in the week, a total supported by GPT-5.5 and Gemini 3.5 Flash. Gemini 3.5 Flash noted that the count is 6 if only the Monday-Friday weekdays are included, while Claude Opus 4.7 and Grok 4.3 both provided lower, inaccurate totals due to significant spelling oversights.

2 of 4 models agreed