Multiple Choice Question: What type of sequence is 12, 6, 4, 3, ...?

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Orphaned Multiple Choice Questions (MCQ) due to changes of exam system.

A merchant buys goods at 25% off the list price. He desires to mark the goods so that he can give a discount of 20% on the marked price and still clear a profit of 25% on the selling price. What per cent of the list price must he mark the goods?
Allan and Bernard start at the same time from two places 136 km apart and travel toward each other. Allan travels 10 kph and Bernard 8 kph. If Bernard rests 1 hour on the way, in how many hours will they meet?
I was walking along the road at 6kph when a car dashed past me and only missed me by a few inches.
Find the sum of $$ 1 + 2\left( \dfrac{1}{3} \right) + 3\left( \dfrac{1}{3} \right)^2 + 4\left( \dfrac{1}{3} \right)^3 + \ldots + n\left( \dfrac{1}{3} \right)^{n - 1} + \dots $$
The diagonals of a parallelogram are 16 cm and 28 cm, respectively. One side of the parallelogram is 12 cm. Find the area of the parallelogram.
Mario’s hat is four more than Alex’s hat and one-half that of Gabriel’s hat. If the total number of hats is 24, how many hats does Alex have?
vSk9ZBx-3 Determine the distance of the point from the center of the bigger pulley where the belt will cross when cross-connected.
Find the radius of the circumscribing circle of the regular octagon having an area of 320 cm2.
Solve for x if log_3 2x - log_3 (x + 5) = 0.
A certain bacterial culture doubles in number every day. If there were 1000 bacteria at the end of the 1st day, how many will there be after 10 days?
k2X6fTJ-3 Find the capacity of the tank in liters.
After M students took the test, there was a total of 64% of correct answers. If the test contains 50 questions, what is the least number of questions that the next student have to get right to bring the total of correct answers to 70%?
A man and a boy can do in 15 days a piece of work which could be done by 7 men and 9 boys in 2 days.
Find x if the point (x, 2) is equidistant from (3, 2) and (7, 2).
A hot air balloon rising straight up from a level field is track by a range finder 500 ft from the point of lift off.

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