Which English verb becomes past tense just by rearranging the letters?

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

People put me on the table and cut me but do not eat me. What am I?

Which five letter word can be added at the end of below word to form a
valid word?

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If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

There is something which is always coming but never arrives?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?