Number Test

21 If the first and second digits in the sequence 5981327438 are interchanged, also the third and fourth digits, the fifth and sixth digits and so on, which digit would be the seventh counting to your left ?

22 If the numbers from 1 to 45 which are exactly divisible by 3 are arranged in ascending order, minimum number being on the top, which would come at the ninth place from the top ?

23 Count each 1 in the following sequence of numbers that is immediately followed by 2, if 2 is not immediately followed by 3. How many such l's are there ? 12134512352126145112412321752125

24 Nitin was counting down from 32. Sumit was counting upwards the numbers starting from 1 and he was calling out only the odd numbers. What common number will they call out at the same time if they were calling out at the same speed ?

25 In the series, 641228742153862171413286 how many pairs of successive numbers have a difference of 2 each ?

26 How many 3's are there in the following sequence which are neither preceded by 6 nor immediately followed by 9 ? 9366395937891639639

27 7897653428972459297647 9 How many 7's are preceded by 9 and followed by 6 ?

28 In the following series of numbers, find out how many times, 1, 3 and 7 have appeared together, 7 being in the middle and 1 and 3 on either side of 7 ? 2 9 7 3 1 7 3 7 7 1 3 3 1 7 3 8 5 7 1 3 7 7 1 7 3 9 0 6

29 In the following series, how many such odd numbers are there which are divisible by 3 or 5. then followed by odd numbers and then also followed by even numbers ? 12, 19, 21, 3, 25, 18, 35, 20, 22, 21, 45. 46, 47, 48, 9, 50, 52, 54, 55, 56

30 If the position of the first and the sixth digits of the sequence of numbers 8903214675 are interchanged, the second and the seventh and so on, which number would be seventh from the right end ?