Application of Sequence (W5-Pre - Assessment )

In an arithmetic sequence 11, 9, 7. . ., what is the 10th term?

• -7

• -9

• -11

• -13

How many numbers divisible by 3 are between 10 and 100?

• 28

• 30

• 32

• 34

Insert 3 arithmetic mean between 9 and 25.

• 13, 17, 21

• 12, 15, 18

• 11, 15, 19

• 10, 14, 18

What is the sum of the first 20 natural numbers which is multiple of 5?

• 1050

• 1150

• 1250

• 1350

My school is raising a fund to help the poor families in a certain barangay which is affected by the COVID 19 pandemic. If each student contributes P50 each month and it increases by P10 for each succeeding month. How much will be the total contribution of student in 3months?

• P150

• P180

• P210

• P240

I bought a smartphone that costs P18, 000 and an expert says that this smartphone depreciates its value by 8% per year. Will I still be able to sell my phone by P7000 after 5 years?

• No, because the selling price is lower that its depreciated value.

• No, because the selling price is higher that the depreciated value.

• Yes, because the selling price is lower than the depreciated value

• Yes, because the selling price is higher than the depreciated value

In a geometric sequence, a3 = 48 and a5 = 768, what is its common ratio?

• 2

• 4

• 6

• 8

The side of the square has a length equal to 2 cm. Construct another square inside the first one by connecting the midpoints of the first square. Continue constructing a square by connecting the midpoint of the previous square. Find the area of the nth inscribed square.

• $A_n=2+\left(n-1\right)\ \frac{1}{2}$

• $A_n=2\left(\frac{1}{2}\right)n-1$

• $S_n=\frac{n}{2}\left[2\left(2\right)+\left(n-1\right)\ \frac{1}{2}\right]$

• $S_n=\frac{2\left(1-\left(\frac{1}{2}\right)^n\right)}{1-\frac{1}{2}}$

Dharwin is at the top of 50 feet building and he is going to drop the ball into the ground. When the ball bounced, it reaches a height that is 3/5 of the previous height. What is the total distance travelled by the ball?

• 50 ft.

• 100 ft.

• 150 ft.

• 200 ft.

The Department of Health recorded the number of recoveries for Covid-19 pandemic. If 6 patients were recovered on the first week and doubles every week. How many recoveries are there on the 12th week?

• 12,288

• 12,828

• 12,882

• 12,200