BIRTHDAY - IBTRDHYA BLAZER - LBZARE REMOVE - ? Using the same logic as applied for the first two pairs of terms, select the term that can replace the question mark (?) in the third pair.
- (a)EROMEV
- (b)ERMOVE
- (c)EROMVE
- (d)EVOMER
Answer
Why
Correct — A. Check the letters first: IBTRDHYA uses exactly the letters of BIRTHDAY, so nothing is substituted and the operation is purely positional.
Rule: split the word into blocks of two from the left and swap the letters inside every block — 1 with 2, 3 with 4, 5 with 6, and so on.
BIRTHDAY → BI RT HD AY → IB TR DH YA = IBTRDHYA
BLAZER → BL AZ ER → LB ZA RE = LBZARE
REMOVE → RE MO VE → ER OM EV = EROMEV → option (a)
No letter leaves its own block, which is why REMOVE comes back as three swapped pairs.
Why the others are wrong
- (b)ERMOVE — ERMOVE swaps only the first block. MO and VE are left exactly as the word prints them, so the rule has been abandoned after two letters.
- (c)EROMVE — EROMVE swaps the first two blocks but leaves the last block VE untouched. Every block gets the same treatment, the final one included.
- (d)EVOMER — EVOMER is REMOVE written backwards, a whole-word reversal. That operation would have turned BIRTHDAY into YADHTRIB, not IBTRDHYA.
Concept
Word-transformation items ask for an operation that moves letters between positions without changing which letters are present. So check the letter set first: if the output is an anagram of the input, the rule is positional and no shift is involved.
Then look for the smallest repeating unit. BIRTHDAY and IBTRDHYA agree letter for letter and the first two have traded places, which suggests pairs. Six-letter BLAZER confirms the same pairing, so REMOVE gets it too.
Pair-swapping only works cleanly on words of even length, and all three words here have an even letter count. An odd-length word would leave a letter with no partner.
Key facts
- IBTRDHYA is an anagram of BIRTHDAY, so no letter has been substituted.
- REMOVE splits as RE, MO, VE and becomes ER, OM, EV.
- A whole-word reversal of REMOVE would give EVOMER, which is a different operation.
Study next
Common traps
- Swapping the first pair and assuming the remaining letters look after themselves
- Reading the change as a full reversal because the opening letters look reversed
SSC prints two solved word pairs and asks for the third, and the operation is positional rather than alphabetical. Positional letter work also runs in this shift at Reasoning Q.13, which asks you to fill blanks in a repeating letter series.
Related PYQs
No directly related past PYQ was found.