Monday Madness

1)
2, 3, 5, 7, 9, 11, 13, ?

What is the next number in this series?


2)
I like 225 but not 224; I like 900 but not 800; I like 144 but not 145.

Which do I like - 1600 or 1700?

3)
If you count from 1 to 100, how many 7's will you pass on the way?

1:- 15 (just add 2 to last number) 2:- 1600 (you like numbers that are odd not even when each digit is added together) 3:- 20 (quick count in my head so may be wrong)

#1. Incorrect

#2. Correct answer… wrong logic.

#3. Correct.

1)
2, 3, 5, 7, 9, 11, 13, ?

These are all prime, so the next number in sequence ought to be 17.

2, 3, 5, 7, 9, 11, 13, ?
These are all prime, so the next number in sequence ought to be 17.

?

#1) They are all supposed to be prime numbers so the next is 17 - Well done JonTom

#2) 1600 is correct because I like perfect squares. - Close enough terry1966.

#3) The are 20 7's between 0 and 100 - Well done terry1966

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Because I borrowed question #1 from elsewhere and missed that 9 is not a prime number… oldman960 gets something also.

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What did I miss? When did 9 become prime?

You didn't miss anything… it was a bad question.

Yeah, I have to admit I just kind of glanced at the question rather than spending lots of time on it (which is why I missed the 9). Oldman can have my ice cream for spotting the error

Naw, you keep it, you got the accepted answer. The first time I looked at the question, prime numbers are what poped into my mind….until I saw the 9 hiding in there acting all innocent.