1
Find the pattern
H โ K (H=8, K=11, difference = +3)
O โ R (O=15, R=18, difference = +3)
R โ U (R=18, U=21, difference = +3)
S โ V (S=19, V=22, difference = +3)
E โ H (E=5, H=8, difference = +3)
2
Pattern identified = Each letter shifts +3 positions
3
Apply to TIGER
T โ W (T=20, +3=23=W)
I โ L (I=9, +3=12=L)
G โ J (G=7, +3=10=J)
E โ H (E=5, +3=8=H)
R โ U (R=18, +3=21=U)
Answer: TIGER = WLJHU
Worked Example 2:
Question: If in a certain code, BRAIN is written as CQBJO, how is SMILE written?
1
Analyze each position
B โ C (+1)
R โ Q (-1)
A โ B (+1)
I โ J (+1)
N โ O (+1)
2
Pattern = +1, -1, +1, +1, +1 (mostly +1 except 2nd position)
3
Apply to SMILE
S โ T (+1)
M โ L (-1)
I โ J (+1)
L โ M (+1)
E โ F (+1)
Answer: SMILE = TLJMF
Shortcut Trick #2 - Reverse Alphabet Method:
If AโZ, BโY, CโX pattern appears, use formula: Coded Letter Position = 27 - Original Letter Position.
Shortcut Trick #3 - Number Coding Quick Check:
For number codes, first check if numbers represent alphabetical positions (A=1, B=2...). If not, look for arithmetic progression patterns.
#1 Most Common Trap/Mistake:
Students often assume the same shift applies to all letters without checking each position carefully. Many codes use different shifts for different positions (like Example 2 above). Always verify the pattern for at least 3 letters before applying to the answer