$$6 {4\over 9}$$ % ..???kkk

Direction: What value will come in place of the question mark (?) in the following question?

1, ?, 3, 15, 105, 945

Direction: What value will come in place of the question mark (?) in the following question?

2.4, 3.6, 5.1, 6.9, ?, 11.4

Direction: What value will come in place of the question mark (?) in the following question?

230, 204, 187, 177, 172, ?

Direction: What value will come in place of the question mark (?) in the following question?

32, 50, 86, ?, 212, 302

Direction: What value will come in place of the question mark (?) in the following question?

42, 67, 116, ?, 406, 695

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

? × 350.01 ÷ 3.992² = 983 ÷ 14.001

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

(1110.02 + 89.81) ÷ ? – $${\sqrt{15}}$$= 15.98