Number and Algebra - Arithmetic Sequences and Series (Eng. Ver)

In one city there were 128 people who tested positive for Covid-19. If every day the Ikhlas Medical Team (with the permission of God Almighty) succeeds in curing 8 patients infected with the virus, how many days will it take the Ikhlas Medical Team to cure all the Corona patients?

• 8 days

• 12 days

• 16 days

• 20 days

• 24 days

Given an arithmetic sequence with the second term = -3 and the eighth term = 15. The value of U₁₆ is ....

• 27

• 30

• 33

• 36

• 39

• 72

• 144

• 216

• 288

• 360

Given that the 4th term and 10th term of an arithmetic sequence are 2 and -10 respectively. The sum of the first 20 terms of the series is...

• -290

• -280

• -220

• -210

• -200

The sum of natural numbers between 1 and 200 that is divisible by 4 is...

• 4500

• 4600

• 4700

• 4800

• 4900

It is known that an arithmetic series has 12 terms. The sum of the first three terms is 9 and the sum of the last three terms is 63. The sum of all the terms of the series is...

• 96

• 124

• 130

• 144

• 156

A piece of tape is divided into 10 lengths that form an arithmetic series. If the shortest ribbon is 20 cm and the longest is 155 cm, the length of the original ribbon is...

• 800

• 825

• 850

• 875

• 900

A performance hall has 15 rows of seats. In the front row there are 10 seats, in the second row 14 seats, in the third row 18 seats, and so on. The number of seats available in the performance room is...

• 420

• 460

• 490

• 560

• 570

Badu wants to distribute Rp. 100,000,000.00 to his 5 children. The first child gets Rp. 5,000,000.00 more than the second child. The second child received Rp. 5,000,000.00 more than the third child, and so on. The amount of money received by the first child is...

• Rp 40 000 000,00

• Rp 35 000 000,00

• Rp 30 000 000,00

• Rp 25 000 000,00

• Rp 20 000 000,00

The factory of white and gray school uniforms made by Vocational School students majoring in Fashion in the first month produced 80 sets. Each subsequent month, production results increase by 10 sets, forming an arithmetic series. The total amount of product during the first 6 months was ⋯ sets.

• 530

• 620

• 625

• 630

• 840