The group velocity of matter waves associated with a

13% of 200 + 56 ÷ 4 = 8% of ? 

187 ÷ 5 ÷ 0.4 = ? – 24 × 2.4

What will come in the place of question mark (?) in the given expression?

(55 × 8 + 28) × 10 = ?

The value of 42 ÷ 9 of 6 - [64 ÷   48 x 3 – 15 ÷ 8 x (11 – 17) ÷ 9] ÷ 14 is:

`2(1/3)` + `4(1/4)` + `4(2/3)` + `8(7/6)` + ? = `4(3/5)xx4(1/2)`

1.55 + 2.05 + 1.5 × 11 – 20% of 10.5 = ?

522 + 160% of 80 - 130 = ? X 13 

65% of ? = 50 + 20 × 4

?% of 140 + 16% of 250 = 6² × 12

6 × 5.5 + 4.5 × 20 - 102 = ?