Grouping Goodies

Pat counts her sweets in different groups and both times she has some left over. How many sweets could she have had?

What Number?

I am less than 25. My ones digit is twice my tens digit. My digits add up to an even number.

Odd Tic Tac

An odd version of tic tac toe

Light the Lights

Stage: 1 Challenge Level:

Thomas of QEGS Wakefield identified the rules:

To light the YELLOW light the rule is: < $30$
To light the RED light the rule is: Have an odd tens digit
To light the BLUE light the rule is: Multiple of $5$
To light the GREEN light the rule is: Is odd

Ahmad reasoned well to explain the minimum number which lit up all the lights:

The answer is $15$.
Its tens digit is the smallest, from the allowed, which is $10$. Its unit digit is $5$ ; it is not zero because then it would be even and wouldn't light the green. It is also less than $30$.

Are you both sure that the yellow light only lights up for numbers under $30$?