Coding-Decoding & Alphabet: Practice Questions with Answers

Letter and number codes, alphabet positions and dictionary order. Try each question first: tap an option to check it, and the explanation appears below.

1. Question 1Easy

   In the English alphabet, which letter is 8th to the right of the 12th letter from the right?

   A.WB.VC.XD.G
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   ✅ A. W

   The 12th letter from the right is the (27 − 12) = 15th letter from the left, which is O. Moving 8 places to the right gives position 15 + 8 = 23, which is W.

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2. Question 2Medium

   In a certain code, PEN is written as 35 and OWL is written as 50. How is KEY written in that code?

   A.43B.42C.41D.40
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   ✅ C. 41

   Each word is coded as the sum of its letters' positions in the alphabet. PEN: 16 + 5 + 14 = 35. OWL: 15 + 23 + 12 = 50. So KEY = 11 + 5 + 25 = 41.

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3. Question 3Medium

   In a certain code, BOX is written as 41 and NET is written as 39. How is INK written in that code?

   A.36B.34C.33D.35
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   ✅ B. 34

   Each word is coded as the sum of its letters' positions in the alphabet. BOX: 2 + 15 + 24 = 41. NET: 14 + 5 + 20 = 39. So INK = 9 + 14 + 11 = 34.

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4. Question 4Easy

   In the English alphabet, which letter is 7th to the right of the 8th letter from the left?

   A.NB.PC.OD.A
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   ✅ C. O

   The 8th letter from the left is H. Moving 7 places to the right gives position 8 + 7 = 15, which is O.

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5. Question 5Easy

   In the English alphabet, which letter is 7th to the left of the 14th letter from the left?

   A.HB.UC.FD.G
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   ✅ D. G

   The 14th letter from the left is N. Moving 7 places to the left gives position 14 − 7 = 7, which is G.

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6. Question 6Easy

   In a certain code, LIGHT is written as MJHIU. How is TIGER written in that code?

   A.SFHJUB.SHFDQC.UJHFSD.VKIGT
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   ✅ C. UJHFS

   Compare each letter of LIGHT with MJHIU: L → M, I → J, G → H, H → I, T → U. Every letter moves 1 place forward in the alphabet. Applying the same rule to TIGER: T → U, I → J, G → H, E → F, R → S. So TIGER is written as UJHFS.

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7. Question 7Easy

   In a certain code, GLASS is written as KPEWW. How is STONE written in that code?

   A.WXSRIB.XYTSJC.IRSXWD.OPKJA
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   ✅ A. WXSRI

   Compare each letter of GLASS with KPEWW: G → K, L → P, A → E, S → W, S → W. Every letter moves 4 places forward in the alphabet. Applying the same rule to STONE: S → W, T → X, O → S, N → R, E → I. So STONE is written as WXSRI.

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8. Question 8Easy

   In a certain code, RAIN is written as TCKP. How is FROG written in that code?

   A.HTQIB.IQTHC.IURJD.DPME
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   ✅ A. HTQI

   Compare each letter of RAIN with TCKP: R → T, A → C, I → K, N → P. Every letter moves 2 places forward in the alphabet. Applying the same rule to FROG: F → H, R → T, O → Q, G → I. So FROG is written as HTQI.

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9. Question 9Medium

   In a certain code, EGG is written as 19 and OWL is written as 50. How is JAR written in that code?

   A.31B.29C.30D.28
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   ✅ B. 29

   Each word is coded as the sum of its letters' positions in the alphabet. EGG: 5 + 7 + 7 = 19. OWL: 15 + 23 + 12 = 50. So JAR = 10 + 1 + 18 = 29.

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10. Question 10Easy

    In the English alphabet, which letter is 5th to the left of the 13th letter from the right?

    A.IB.JC.HD.S
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    ✅ A. I

    The 13th letter from the right is the (27 − 13) = 14th letter from the left, which is N. Moving 5 places to the left gives position 14 − 5 = 9, which is I.

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11. Question 11Medium

    If the words BRAVE, BREAD, BRAIN, BRASS are arranged in the order of a dictionary, which word comes 1st?

    A.BRAVEB.BREADC.BRAIND.BRASS
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    ✅ C. BRAIN

    All the words share their first letters, so compare letter by letter until they differ. In dictionary order they are: BRAIN, BRASS, BRAVE, BREAD. The 1st word is BRAIN.

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12. Question 12Easy

    In the English alphabet, which letter is 4th to the left of the 22nd letter from the right?

    A.BB.RC.AD.I
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    ✅ C. A

    The 22nd letter from the right is the (27 − 22) = 5th letter from the left, which is E. Moving 4 places to the left gives position 5 − 4 = 1, which is A.

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13. Question 13Medium

    In a certain code, NET is written as 39 and EGG is written as 19. How is TEA written in that code?

    A.26B.27C.28D.25
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    ✅ A. 26

    Each word is coded as the sum of its letters' positions in the alphabet. NET: 14 + 5 + 20 = 39. EGG: 5 + 7 + 7 = 19. So TEA = 20 + 5 + 1 = 26.

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14. Question 14Medium

    In a certain code, FROG is written as GTRK. How is HAND written in that code?

    A.KDQGB.ICQHC.JDRID.IBOE
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    ✅ B. ICQH

    Compare FROG with GTRK: F → G, R → T, O → R, G → K. The letters move +1, +2, +3, +4 places, one more for each position. Applying the same steps to HAND: H → I, A → C, N → Q, D → H. So the code is ICQH.

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15. Question 15Medium

    If the words BRAND, BREAD, BRASS, BRAIN are arranged in the order of a dictionary, which word comes 2nd?

    A.BRANDB.BREADC.BRASSD.BRAIN
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    ✅ A. BRAND

    All the words share their first letters, so compare letter by letter until they differ. In dictionary order they are: BRAIN, BRAND, BRASS, BREAD. The 2nd word is BRAND.

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16. Question 16Medium

    In a certain code, BUS is written as 42 and ICE is written as 17. How is EGG written in that code?

    A.18B.21C.20D.19
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    ✅ D. 19

    Each word is coded as the sum of its letters' positions in the alphabet. BUS: 2 + 21 + 19 = 42. ICE: 9 + 3 + 5 = 17. So EGG = 5 + 7 + 7 = 19.

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17. Question 17Easy

    In a certain code, WIND is written as ZLQG. How is LAMP written in that code?

    A.SPDOB.PEQTC.ODPSD.NCOR
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    ✅ C. ODPS

    Compare each letter of WIND with ZLQG: W → Z, I → L, N → Q, D → G. Every letter moves 3 places forward in the alphabet. Applying the same rule to LAMP: L → O, A → D, M → P, P → S. So LAMP is written as ODPS.

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18. Question 18Medium

    In a certain code, CUP is written as XFK. How is DOOR written in that code?

    A.WLLIB.XLLIC.EPPSD.ILLW
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    ✅ A. WLLI

    Each letter is replaced by its opposite letter in the alphabet (A ↔ Z, B ↔ Y, C ↔ X, and so on). A letter and its opposite always add up to 27 in position: C (3) → X (24), U (21) → F (6), P (16) → K (11). For DOOR: D → W, O → L, O → L, R → I. So the code is WLLI.

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19. Question 19Easy

    In a certain code, WIND is written as XJOE. How is FISH written in that code?

    A.ITJGB.EHRGC.HKUJD.GJTI
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    ✅ D. GJTI

    Compare each letter of WIND with XJOE: W → X, I → J, N → O, D → E. Every letter moves 1 place forward in the alphabet. Applying the same rule to FISH: F → G, I → J, S → T, H → I. So FISH is written as GJTI.

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20. Question 20Medium

    In a certain code, GATE is written as TZGV. How is NEST written in that code?

    A.GHVMB.NVHGC.OFTUD.MVHG
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    ✅ D. MVHG

    Each letter is replaced by its opposite letter in the alphabet (A ↔ Z, B ↔ Y, C ↔ X, and so on). A letter and its opposite always add up to 27 in position: G (7) → T (20), A (1) → Z (26), T (20) → G (7), E (5) → V (22). For NEST: N → M, E → V, S → H, T → G. So the code is MVHG.

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