exam Maths Puzzle Numerical Ability

100s2-9=0

Im really confused and I have to solve this by factoring.

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exam Other Question

if 27 million is 98% of the population how much is the other 2%? Taya and Jed collect coins. The ratio of the number of coins in their collections, in some order, is 4 to 3. If Taya has 60 coins in her collection, how many coins could Jed have?