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?

The point P(a, b) is first reflected in origin to P1 and P1 is reflected in Y-axis to (4, -3). What are the co-ordinates of point P?

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?

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 ?

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

Assuming that the numbers in each of the following figures follow a similar pattern, select the option that can replace the question mark (?) in figure C.