Refer to the following series and answer the question. (Counting to be done from left to right only.) (All numbers are single-digit numbers only.) (Left) 7 3 5 2 3 5 3 5 2 2 5 2 5 2 5 6 5 4 6 5 4 9 9 8 5 5 2 (Right) How many such even digits are there, each of which is immediately preceded by a perfect square and immediately followed by an even digit? (NOTE: 1 is also a perfect square.)
None
Scanning the series left to right, checking each even digit for a preceding perfect square (1, 4, or 9) and a following even digit.
Systematically checking all 27 digits shows that whenever an even digit follows a perfect square, the digit after it turns out to be odd, not even.
Hence, there are no such even digits in the series.
Similar Questions
- Select the number from the given options, that has the same relation to the fifth number as the second and fourth numbers have with the first and third numbers respectively.
15 : 1365 :: 27 : 2817 :: 43 : ? - Out of the number-pairs listed below, three are alike in the way they are related to each other. Select the odd one.
- Observe the four number-pairs listed below. In three of them, the numbers are related to each other by a specific logic. Select the number pair that does not follow the same logic as the other three.
- If 2 is added to each even digit and 1 is subtracted from each odd digit in the number 9524367, then how many digits will appear more than once in the new number thus formed?
- This question is based on the five, three-digit numbers given below.
(Left) 538 745 317 853 276 (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 added to the second digit of the lowest number? - Select the option that is related to the third number in the same way as the second number is related to the first number.
2 : 32 :: 4 : ? - Select the number from among the given options that can replace the question mark (?) in the following series.
12496, 12448, 12424, ? The rectangle represents a set of calculations that are common across all the given equations. Identify the calculations involved and solve the third equation on the same basis:
Select the option that is similar to the following numbers in a certain manner.
361, 729, 841
- Study the given pattern carefully and select the numbers from among the given options that can replace the question marks (?).
25 ◆ 64 = 5 ; 8 ; 13
144 ◆ 36 = 12 ; 6 ; 18
121 ◆ 81 = ? ; ? ; ?
Important Questions from Number Based
Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different. (Any operation on digits is not allowed)
Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.
Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.
Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.
Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.
