Answer:
My first is in riddle but not in little. My second is in think but not in brink. My third is in thyme but not in time. My fourth is in mother but not in brother. My last is in time but no t in climb.
In all the world none can compare I am a tiny weaver my deadly cloth so silky and fair.
I went into the woods and got it. I sat down to seek it. I brought it home with me because I couldn’t find it. What is it?
I am the kind of ant that's good at math.
When I live I cry if you don't kill me I'll die.
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?