​How many odd numbers are preceded by the number 4 in the following series?

2 6 6 3 4 5 2 4 9 8 6 4 3 4 8 2

How many even numbers are there in the following number sequence which are preceded and succeeded by an odd number?
1 2 3 3 2 1 4 2 3 1 4 2 2 3 3 1 4 1

Refer to the following number series and answer the question that follows (all numbers are single-digit numbers only). Counting to be done from left to right only.
(Left) 4 7 1 9 0 5 3 8 2 6 1 4 7 9 2 0 3 6 8 5 1 2 7 3 4 (Right)
How many of the numbers are perfect squares?

This question is based on the five, three-digit numbers given below.
(Left) 388 739 783 483 785 (Right)
(Example: 697 – First digit = 6, second digit = 9 and third digit = 7)
(NOTE: All operations to be done from left to right.)
What will be the resultant if the first digit of the highest number is subtracted from the third digit of the lowest number?

This question is based on the five, three-digit numbers given below.
(Left) 611 733 279 265 370 (Right)
(Example: 697 – First digit = 6, second digit = 9 and third digit = 7)
(NOTE: All operations to be done from left to right.)
What will be the resultant if the second digit of the highest number is added to the first digit of the lowest number?

This question is based on the five, three-digit numbers given below.
(Left) 535 647 232 804 152 (Right)
(Example: 697 – First digit = 6, second digit = 9 and third digit = 7)
(NOTE: All operations to be done from left to right.)
What will be the resultant if the second digit of the highest number is subtracted from the third digit of the lowest number?

This question is based on the five, three-digit numbers given below.
(Left) 307 485 194 237 937 (Right)
(Example: 697 – First digit = 6, second digit = 9 and third digit = 7)
(Note: All operations to be done from left to right.)
What will be the resultant if the third digit of the highest number is subtracted from the first digit of the lowest number?

This question is based on the five, three-digit numbers given below.
(Left) 103 678 217 111 537 (Right)
(Example: 697 – First digit = 6, second digit = 9 and third digit = 7)
(Note: All operations to be done from left to right.)
What will be the resultant if the second digit of the highest number is added to the first digit of the lowest number?​

This question is based on the five, three-digit numbers given below.
(Left) 514 414 422 875 167 (Right)
(Example: 697 – First digit = 6, second digit = 9 and third digit = 7)
(Note: All operations to be done from left to right.)
What will be the resultant if the second digit of the highest number is subtracted from the second digit of the lowest number?

This question is based on the five, three-digit numbers given below.
(Left) 411 559 916 247 769 (Right)
(Example- 697 – First digit = 6, second digit = 9 and third digit = 7)
(NOTE: All operations to be done from left to right.)
What will be the resultant if the first digit of the lowest number is subtracted from the first digit of the highest number?​