Jamia Millia Islamia Coding Decoding Previous Year Questions (PYQs) – Page 2 of 2
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In a coded language, COMPUTER is written as RETUMPOC. How is MACHINE written in the same code?
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Solution
Pattern: The word COMPUTER is reversed.
COMPUTER → RETUMPOC.
Hence, MACHINE → ENIHCAM.
If COOL is coded as DQRP, then write the code for HOT.
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Solution
Each letter shifted by +1, +2, +3 respectively.
C→D, O→Q, O→R, L→P.
Similarly for HOT: H→I, O→Q, T→W.
If ‘120456’ is to ‘315’, then ‘204562’ is to …
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Solution
Split into first three and last three digits.
For 120456: $(1+2+0)=3$ and $(4+5+6)=15 \Rightarrow 315$.
For 204562: $(2+0+4)=6$ and $(5+6+2)=13 \Rightarrow 613$.
If $D=23$, $H=19$, decode 8767.
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Solution
Mapping is $A!\mapsto!26$, $B!\mapsto!25$, … (i.e., value $=27-\text{position}$).
$8!\to!27-8=19=S$, $7!\to!20=T$, $6!\to!21=U$, $7!\to!20=T$.
$8!\to!27-8=19=S$, $7!\to!20=T$, $6!\to!21=U$, $7!\to!20=T$.
If BEAT is written as GIDV, then SOUP may be written as
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Solution
Shifts by +5, +4, +3, +2:
B→G (+5), E→I (+4), A→D (+3), T→V (+2).
Apply to SOUP: S→X (+5), O→S (+4), U→X (+3), P→R (+2) ⇒ XSXR.
This exact result isn’t in the options; closest pattern-wise is option (A)
B→G (+5), E→I (+4), A→D (+3), T→V (+2).
Apply to SOUP: S→X (+5), O→S (+4), U→X (+3), P→R (+2) ⇒ XSXR.
This exact result isn’t in the options; closest pattern-wise is option (A)
If 213 = 419, 322 = 924, 415 = 16125; then 215 = ?
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Solution
Rule → square 1st & last digits, keep middle same.
213 → 2² 1 3² = 4 1 9; 322 → 3² 2 2² = 9 2 4; 415 → 4² 1 5² = 16 1 25.
So 215 → 2² 1 5² = 4 1 25 = **4125**.
If ‘HEALTH’ is written as ‘GSKZDG’, then how will ‘NORTH’ be written in that code?
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Solution
Rule = reverse the word, then shift each letter **−1**.
HEALTH → (reverse) HTLAEH → (−1) GSKZDG ✓
NORTH → (reverse) HTRON → (−1) GSQNM.
If HOTEL = 55, then BORE = ?
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Solution
Use sum of letter positions: B(2)+O(15)+R(18)+E(5)=40.
(Note: For HOTEL, sum is 60; the stated 55 appears to be a misprint.)
In a certain code 13479 → AQFJL and 5268 → DMPN. How is 396824 written?
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Solution
Digit→letter map from samples:
1→A, 3→Q, 4→F, 7→J, 9→L, 5→D, 2→M, 6→P, 8→N.
Thus 396824 → 3 9 6 8 2 4 → Q L P N M F → QLPNMF.
If DRIVER = 12, PEDESTRIAN = 20, ACCIDENT = 16, then CAR = ?
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Solution
Value = 2 × (number of letters). DRIVER(6)=12, PEDESTRIAN(10)=20, ACCIDENT(8)=16 ⇒ CAR(3)=6.
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