What was the cumulative growth in the Index of Eight

Out of four numbers the average of the first three is 16 and that of the last three is 15. If the last number is 20 then the first number is

Find the sum of all those 3-digit numbers which when divided by 10 leave a remainder of 5.

If y = ∛ 6 – 4, then what is the value of y³ + 12y² + 48y + 100?

If x varies inversely as (y² – 1) and is equal to 40 when y = 5 then the value of x and y = 7 is

 If 1.5x = 0.04y, then the value of

If y = 5, then what is the value of 10y

Find the value of 6 + 66 + 666 + 6666 +hellip;hellip;hellip;hellip;.. + n terms.

1. `(2)/(3) ((10 xx (10^(n)- 1))/9 - n)`

2.

Find the smallest integer that must be subtracted from 653, so that it is divisible by both 23 and 27.