Numbers Questions

Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 429, then what is the difference between the first and the third number?

What is the sum of first 40 terms of 1 + 3 + 4 + 5 + 7 + 7 + 10 + 9 + ....?

What is the unit place digit in the expansion of  773?

There is a three digit number. The digit at the tenth place is 3. If the place of all the digits are replaced with each other symmetrically about the tens position,then the new number obtained is 396 more than the original three digit number. The sum of the digits at unit & hundredth place is 14. Find out the original number?

The average of 3 consecutive even numbers is A. If next 5 even numbers are added, then what is the average of these 8 numbers?

Of the 5 numbers whose average is 76, the first is 3/7 times the sum of other 4. The first number is

In the given series of numbers how many 7's are there which are immediately followed by 9 and immediately not preceeded by 5 ?

What is 0.53 + 0.53equal to ?