HOW DO YOU GO FROM 98 TO 720 USING JUST ONE LETTER RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

I am Artichoke. Did you answer this riddle correctly?
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A pig.(bacon) Did you answer this riddle correctly?
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Short. Did you answer this riddle correctly?
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A dino-score Did you answer this riddle correctly?
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Ape Lincoln! Did you answer this riddle correctly?
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'Startling' is the word. Begin by removing 'l', which makes it 'starting', then take away the 't', making it 'staring', and so on - string; sting; sing; sin; in; and, I. Did you answer this riddle correctly?
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Harvest.

Har is another name for Shiva.
A vest is something you wear.
And a harvest might use a scythe. Did you answer this riddle correctly?
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A good lawyer knows the law. A great lawyer knows the judge. Did you answer this riddle correctly?
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Japan Did you answer this riddle correctly?
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Few Did you answer this riddle correctly?
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Happenchance. There are two Hs, two As, and so on for all the letters in the word. Did you answer this riddle correctly?
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The familiar English word that remains is BANANA after removing the phrase SIX LETTERS. Did you answer this riddle correctly?
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The letter C. (Sea) Did you answer this riddle correctly?
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A smea-gull Did you answer this riddle correctly?
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Elvis Parsley Did you answer this riddle correctly?
YES  NO