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216,64,8,6,4,2,328,589,?

Find missing number 216,64,8,6,4,2,328,589?

.If 𝒂
𝟐−𝟐𝒃𝒄
𝒂𝟐+𝒃𝒄 +
𝟔𝒄𝒂
𝒃𝟐−𝟐𝒄𝒂
+
𝒄
𝟐−𝟑𝒂𝒃
𝟒𝒄
𝟐+𝒂𝒃 = 𝟑, then find the value of 𝟑𝒂𝟐
𝒂𝟐+𝒃𝒄 +
𝟑𝒃
𝟐
𝒃𝟐−𝟐𝒄𝒂
+
𝟏𝟑𝒄
𝟐
𝟒𝒄
𝟐+𝒂𝒃?

If you are buying one jacket at Rs 2,500 and buying two similar jackets at Rs 4,500, then
find the discount percentage. (Marked price of one jacket is `2500)

216,64,8
6,4,2
328,589,?

7,9,15,45,105,235,?

Pinky fills her car tank with 20 liters of petrol. She goes on a journey and end up with just 5.5 liters
of petrol left in the tank. What is the percent change in the petrol in the tank?

18:4::36:16::27:?

99 11/99 + 99 13/99 + 99 15/99 +...+99 67 99 overline 91414 overline 94

where show the mock test marks?