Question

q5. 830, 825, 725, 720, 620, 615, ______, 510
q6. 3780, 3980, 3990, 4190, 4200, 4400, 4410, ____, ____
q7. 6052, 5052, 5050, 4050, 4048, 3048, ______, 2046
part 2
q8*. in 1253, the value of the digit 1 is ______.
q9*. 6221 = 6000 + ______ + 21

• denotes concepts taught in the previous topics.

Explanation:

Q5 Step1: Identify alternating pattern

Pattern: $-5, -100, -5, -100, ...$

Q5 Step2: Apply to last given term

$615 - 100 = 515$

Q6 Step1: Identify alternating pattern

Pattern: $+10, +300, +10, +300, ...$

Q6 Step2: Apply to last given term

$4410 + 300 = 4710$

Q6 Step3: Apply pattern again

$4710 + 10 = 4720$

Q7 Step1: Identify alternating pattern

Pattern: $-1000, -2, -1000, -2, ...$

Q7 Step2: Apply to last given term

$3048 - 1000 = 2048$

Q8* Step1: Locate digit place value

Digit 1 is in thousands place: $1 \times 1000 = 1000$

Q9* Step1: Rearrange to find missing value

$6221 - 6000 - 21 = 200$

Answer:

Q5: 515
Q6: 4710, 4720
Q7: 2048
Q8*: 1000
Q9*: 200