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While both western and eastern Australian deserts occasionally experience drenching rains, the western deserts are covered by sand sheets so __________ that, even during huge rainfalls, very little water runs off and surface rivers rarely form.
In some respects, all geological evidence is __________: we can't, for example, measure ancient aridity, but large-scale Aeolian cross-bedding, sand ripples, evaporites, and rounded sand grains are the results of it, and together, suggest the presence of a desert.
Saturn' s planetary ring system is arguably the _______________ structure known to humankind: it has an end-to-end dimension equivalent to the distance traveled by circling Earth seven times but a vertical height about that of a house.
In general, mass-blooming trees (i.e., trees that grow close together and flower at the same time) use pollinators that are relatively _______________, which puts a greater number of pollinators at their disposal.

Quantity A

$$3^{120}$$

Quantity B

$$6^{60}$$


The average (arithmetic mean) of 5 consecutive even integers is 20.

Quantity A

The least of the 5 integers

Quantity B

16


A sequence of numbers $$p_1, p_2, p_3, .........., p_n,.........$$. is generated by the rules $$p_1=1$$ and $$p_n= 24p_{n-1}+8$$ for each integer $$n ≥ 2$$.

Quantity A

The remainder when $$p_{66}$$ is divided by 6

Quantity B

4


Set $$S$$ is the set of all numbers of the form $$\frac{1}{n(n+1)}$$, where n is a positive integer less than 4.

Quantity A

The sum of all the numbers in $$S$$

Quantity B

$$\frac{2}{3}$$


A certain type of code is a list of 4 identical asterisks and 2 identical dots in any order. For example, **•*•* is one such code.

Quantity A

The number of possible codes of this type

Quantity B

15


Each person who attended a seminar on politics was either a Democrat, a Republican, or an independent. If a person had been selected randomly from those attending the seminar, the probability would have been 0.52 of selecting a Republican and 0.35 of selecting a Democrat. What was the ratio of the number of independents to the number of Republicans at the seminar?

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