Coding-Decoding & Letter Series Rising

A pattern formed by two characters a and b is repeated more than once in the following string: xbxaxaxxaxax bab. What is x x in the 7th and 8th positions from the left in the above string?

If ZERO is encoded as ADSN, then how do you encode STOP?

What comes at X and Y respectively in the following sequence ? January, January, December, October, X, March, October, Y, September

If 7 * 24 = 25 and 12 * 16 = 20, then what is 16 * 63 equal to ?

Consider the sequence AB_CC_A_BCCC_BBC_C that follows a certain pattern. Which one of the following completes the sequence ?

If P = +, Q = −, R = ×, S = ÷, then insert the proper notations between the successive numbers in the equation 60_15_3_20_4 = 20 :

If NO is coded as 210, NOT is coded as 4200 and NOTE is coded as 21000, then how is NOTES coded ?

If FRANCE is coded as 654321 and GERMANY is coded as 9158437, then how is YEMEN coded ?

In a certain code if 64 is written as 343 and 216 is written as 729, then how is 512 written in that code ?

Consider the sequence A _ BCD _ BBCDABC _ DABC _ D that follows a certain pattern. Which one of the following completes the sequence?

If a + b means a − b; a − b means a × b; a × b means a ÷ b; a ÷ b means a + b, then what is the value of 10 + 30 − 100 × 50 ÷ 25? (Operations are to be replaced simultaneously)

If in a certain code, 'ABCD' is written as 24 and 'EFGH' is written as 1680, then how is 'IJKL' written in that code?

If in a certain code, 'POT' is written as ATOP and 'TRAP' is written as APART, then how is 'ARENA' written in that code?

In some code, letters P, Q, R, S, T represent numbers 4, 5, 10, 12, 15. It is not known which letter represents which number. If Q − S = 2S and T = R + S + 3, then what is the value of P + R − T?

If 'ZERO' is written as 'CHUR', then how is 'PLAYER' written ?

Choose the group which is different from the others :

What is the middle term of the sequence Z, Z, Y, Y, Y, X, X, X, X, W, W, W, W, W, . . . , A ?

Consider the sequence ABC _ _ ABC _ DABBCD _ ABCD that follows a certain pattern. Which one of the following completes the sequence ?

The letters of the word "INCOMPREHENSIBILITIES" are arranged alphabetically in reverse order. How many positions of the letter/letters will remain unchanged ?

If the order of the letters in the English alphabet is reversed and each letter represents the letter whose position it occupies, then which one of the following represents 'LUCKNOW'?

In the series AABABCABCDABCDE..., which letter appears at the 100th place?

Following is a matrix of certain entries. The entries follow a certain trend row-wise. Choose the missing entry (?) accordingly. Row 1 : 7B 10A 3C Row 2 : 3C 9B 6A Row 3 : 10A 13C ?

In the English alphabet, the first 4 letters are written in opposite order; and the next 4 letters are written in opposite order and so on; and at the end Y and Z are interchanged. Which will be the fourth letter to the

In a code language 'MATHEMATICS' is written as 'LBSIDNZUHDR'. How is 'CHEMISTRY' written in that code language ?

In the series _b_a_ba_b_abab_aab; fill in the six blanks ( _ ) using one of the following given four choices such that the series follows a specific order.

Consider the following arrangement that has some missing letters : abab_b_bcb_dcdcded_d The missing letters which complete the arrangement are

Consider the following sequence of numbers : 5 1 4 7 3 9 8 5 7 2 6 3 1 5 8 6 3 8 5 2 2 4 3 4 9 6 How many odd numbers are followed by the odd number in the above sequence?

The letters from A to Z are numbered from 1 to 26 respectively. If GHI = 1578 and DEF = 912, then what is ABC equal to?

What is the missing term @ in the following? ACPQ : BESU :: MNGI : @

Consider the following sequence that follows some arrangement : c_accaa_aa_bc_b The letters that appear in the gaps are

If every alternative letter of the English alphabet from B onwards (including B) is written in lower case (small letters) and the remaining letters are capitalized, then how is the first month of the second half of the y

In the sequence 1, 5, 7, 3, 5, 7, 4, 3, 5, 7, how many such 5s are there which are not immediately preceded by 3 but are immediately followed by 7 ?

Consider the following pattern of numbers : 8 10 15 13 6 5 7 4 4 6 8 8 6 11 16 ? What is the number at ? in the above pattern?

If LSJXVC is the code for MUMBAI, the code for DELHI is

If RAMON is written as 12345 and DINESH as 675849, then HAMAM will be written as

In a certain code, '256' means 'red colour chalk', '589' means 'green colour flower' and '254' means 'white colour chalk'. The digit in the code that indicates 'white' is