exam Maths Puzzle Numerical Ability

Jasmine says that there are 362,880 distinguishable permutations of the letters in the word TEXTBOOKS. Do you agree? Justify your answer.

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exam Other Question

* One-fifth of the coins are dimes
* One-sixth of them are nickels
* One-tenth are quarters
* The rest are pennies

the total value is $3.52

How many of each coin do I have If possible, factor: f(x)= x squared - 6x - 91