Fill in the blank space for the given series with the correct alternative.
$1, 4, 9, 16, 25, (\ldots)$

If the digits in the number $5, 7, 3, 4, 6, 2, 9$ are arranged in ascending order from left to right,how many digits will remain at the same position?

Find out the wrong term from the given series.
$10, 26, 74, 218, 654, 1946, 5834$

In the number $7524693$,how many digits will remain at the same position from the beginning if the digits are arranged in ascending order?

Find the missing letters for the given series from the given alternatives:
$b....ac....cc....cb...ab....ac$

Fill in the blank space for the given series with the correct alternative.
$24, 60, 120, 210, (...)$