If the arithmetic mean of 6, 8, 10. x, 7 is 8.the value of x will be

If a, b and c are in GP and a^1/x=b^1/y=c^1/z. The value of 2y is?

The average of five terms is 40. If the first four terms are given as 50, 52, 35 and 46, find the fifth term.

Direction (66-70): What should come in place of the question mark(?) in the following number series?

12664   34    20  14 ?

What will come in place of the question mark (?) in each of the following series?

15     ?    24    33     97    122     

What should come in place of the question mark '?' in the following number series?

77, 76, 84, 57, ?, – 4

Find the next term in the series.

1329, 997, 725, 507, 337, ?

What should come in place of the question mark '?' in the following number series?

17, 52, 158, 477, ? , 4310