About this quiz
BOST: Following Instructions Test, Coding and Matching Test and Numerical Reasoning
This Lok Sewa practice set has 55 multiple-choice questions (Subject: Maths and IQ · For: Kharidar · Level: Medium). Take the quiz above first; after that, use the study list below to revise every question with its correct answer and a short explanation.
Study list: all 55 questions with answers and explanations
Write OFFICE, remove the 2nd letter, replace the last letter with S and reverse it. Result?
- A) SCIFO ✔
- B) OFICS
- C) SCIFFO
- D) ECIFO
Why: OFFICE → remove the 2nd letter: OFICE → last letter to S: OFICS → reverse: SCIFO.
From 2, 7, 4, 9, 6, 3 cross out odd numbers and add the rest. Result?
- A) 12 ✔
- B) 19
- C) 31
- D) 10
Why: Cross out the odd numbers (7, 9, 3). The rest are 2 + 4 + 6 = 12.
If CAT is coded DBU, how is DOG coded?
- A) EPH ✔
- B) CNF
- C) DPH
- D) EOG
Why: Each letter moves one step forward: C→D, A→B, T→U. So D→E, O→P, G→H gives EPH.
If A = 1, B = 2, C = 3 …, what is the code of BAD?
- A) 2-1-4 ✔
- B) 2-1-3
- C) 1-2-4
- D) 2-4-1
Why: B = 2, A = 1, D = 4, so BAD is 2-1-4.
If PEN is coded QFO, then BOOK is coded:
- A) CPPL ✔
- B) APPJ
- C) CPPK
- D) BPPL
Why: Each letter moves one step forward: B→C, O→P, O→P, K→L gives CPPL.
12 files cost Rs 45 each. Total cost?
- A) Rs 450
- B) Rs 540 ✔
- C) Rs 480
- D) Rs 560
Why: Total = 12 × Rs 45 = Rs 540.
18 of 60 employees are on leave. What percentage is on leave?
- A) 18%
- B) 25%
- C) 30% ✔
- D) 36%
Why: 18 ÷ 60 × 100 = 30%.
The average of 20, 30 and 40 is:
- A) 25
- B) 30 ✔
- C) 35
- D) 90
Why: (20 + 30 + 40) ÷ 3 = 90 ÷ 3 = 30.
"Write every second letter of NEPAL". Result?
- A) EA ✔
- B) NPL
- C) EL
- D) NA
Why: In NEPAL the 2nd and 4th letters are E and A, giving EA.
In following-instructions tests, the best first step is to:
- A) Start answering quickly
- B) Read all instructions once ✔
- C) Skip difficult steps
- D) Guess
Why: Read all the instructions once before starting, because later steps can change the answer.
If 5 = E and 1 = A (number = alphabet position), what is 3-1-2?
- A) CAB ✔
- B) BAC
- C) ACB
- D) CBA
Why: 3 = C, 1 = A, 2 = B, so 3-1-2 is CAB.
A clerk files 15 letters an hour. How many in 6 hours?
- A) 75
- B) 80
- C) 90 ✔
- D) 105
Why: 15 letters × 6 hours = 90 letters.
If MOON is written as NPPO, what is SUN?
- A) TVO ✔
- B) RTM
- C) TUN
- D) SVO
Why: Each letter moves one step forward: S→T, U→V, N→O gives TVO.
Rs 1,200 is shared equally among 4 staff. Each gets:
- A) Rs 250
- B) Rs 300 ✔
- C) Rs 350
- D) Rs 400
Why: Rs 1,200 ÷ 4 = Rs 300 each.
Which word appears most often in instruction questions and must be noticed?
- A) and
- B) except ✔
- C) the
- D) is
Why: Words like 'except' reverse what you must do, so they must be noticed.
If BOOK is coded as CPPL, how is DESK coded?
- A) FGUM
- B) EFTL ✔
- C) DESK
- D) LTFE
Why: Each letter moves one step forward: D→E, E→F, S→T, K→L gives EFTL.
If ROAD is coded as SPBE, how is FILE coded?
- A) GJMF ✔
- B) FILE
- C) FMJG
- D) HKNG
Why: Each letter +1: F→G, I→J, L→M, E→F gives GJMF.
If MILK is coded as OKNM, how is RICE coded?
- A) SJDF
- B) GEKT
- C) ULFH
- D) TKEG ✔
Why: Each letter +2 (M→O, I→K): R→T, I→K, C→E, E→G gives TKEG.
If GOLD is coded as FNKC, how is IRON coded?
- A) MNQH
- B) IRON
- C) HQNM ✔
- D) GPML
Why: Each letter −1 (G→F, O→N): I→H, R→Q, O→N, N→M gives HQNM.
If TREE is coded as VTGG, how is LEAF coded?
- A) OHDI
- B) NGCH ✔
- C) MFBG
- D) HCGN
Why: Each letter +2 (T→V, R→T): L→N, E→G, A→C, F→H gives NGCH.
If BANK is coded as CBOL, how is LOAN coded?
- A) MPBO ✔
- B) LOAN
- C) OBPM
- D) NQCP
Why: Each letter +1: L→M, O→P, A→B, N→O gives MPBO.
If PLAY is coded as OKZX, how is WORK coded?
- A) UMPI
- B) JQNV
- C) WORK
- D) VNQJ ✔
Why: Each letter −1 (P→O, L→K): W→V, O→N, R→Q, K→J gives VNQJ.
If STAMP is coded as TUBNQ, how is LETTER coded?
- A) SFUUFM
- B) NGVVGT
- C) MFUUFS ✔
- D) LETTER
Why: Each letter +1: L→M, E→F, T→U, T→U, E→F, R→S gives MFUUFS.
If A = 1, B = 2, C = 3 … Z = 26, what is the sum of the letters of FACE?
- A) 16
- B) 15 ✔
- C) 13
- D) 18
Why: F(6) + A(1) + C(3) + E(5) = 15.
If A = 1, B = 2, C = 3 … Z = 26, what is the sum of the letters of HEAD?
- A) 18 ✔
- B) 16
- C) 21
- D) 19
Why: H(8) + E(5) + A(1) + D(4) = 18.
If A = 1, B = 2, C = 3 … Z = 26, what is the sum of the letters of CAGE?
- A) 14
- B) 19
- C) 17
- D) 16 ✔
Why: C(3) + A(1) + G(7) + E(5) = 16.
If A = 1, B = 2, C = 3 … Z = 26, what is the sum of the letters of BEAD?
- A) 15
- B) 13
- C) 12 ✔
- D) 10
Why: B(2) + E(5) + A(1) + D(4) = 12.
If A = 1, B = 2, C = 3 … Z = 26, what is the sum of the letters of DEAF?
- A) 17
- B) 16 ✔
- C) 14
- D) 19
Why: D(4) + E(5) + A(1) + F(6) = 16.
Write the word CABLE in reverse order. Result?
- A) ELBAC ✔
- B) LBACE
- C) ABLEC
- D) CABLE
Why: CABLE written backwards is ELBAC.
Write the word TABLE in reverse order. Result?
- A) LBATE
- B) ABLET
- C) TABLE
- D) ELBAT ✔
Why: TABLE written backwards is ELBAT.
Write the word PAPER in reverse order. Result?
- A) APERP
- B) PAPER
- C) REPAP ✔
- D) EPAPR
Why: PAPER written backwards is REPAP.
Write the word MONEY in reverse order. Result?
- A) MONEY
- B) YENOM ✔
- C) ENOMY
- D) ONEYM
Why: MONEY written backwards is YENOM.
Write the word STAFF in reverse order. Result?
- A) FFATS ✔
- B) FATSF
- C) TAFFS
- D) STAFF
Why: STAFF written backwards is FFATS.
Write the word CLERK in reverse order. Result?
- A) RELCK
- B) LERKC
- C) CLERK
- D) KRELC ✔
Why: CLERK written backwards is KRELC.
Write the 1st, 3rd, 5th … (odd-position) letters of KATHMANDU. Result?
- A) KTMNUS
- B) AHAD
- C) KTMNU ✔
- D) KTMN
Why: KATHMANDU: positions 1, 3, 5, 7, 9 are K, T, M, N, U, giving KTMNU.
Write the 1st, 3rd, 5th … (odd-position) letters of DOCUMENT. Result?
- A) OUET
- B) DCMN ✔
- C) DCM
- D) DCMNS
Why: DOCUMENT: positions 1, 3, 5, 7 are D, C, M, N, giving DCMN.
Write the 1st, 3rd, 5th … (odd-position) letters of REGISTER. Result?
- A) RGSE ✔
- B) RGS
- C) RGSES
- D) EITR
Why: REGISTER: positions 1, 3, 5, 7 are R, G, S, E, giving RGSE.
Write the 1st, 3rd, 5th … (odd-position) letters of OFFICIAL. Result?
- A) OFC
- B) OFCAS
- C) FIIL
- D) OFCA ✔
Why: OFFICIAL: positions 1, 3, 5, 7 are O, F, C, A, giving OFCA.
Remove all vowels from OFFICE. Result?
- A) FFCE
- B) FC
- C) FFC ✔
- D) FFICE
Why: Remove the vowels O, I, E from OFFICE, leaving FFC.
Remove all vowels from NEPAL. Result?
- A) PL
- B) NPL ✔
- C) NPAL
- D) NPLE
Why: Remove E and A from NEPAL, leaving NPL.
Remove all vowels from FINANCE. Result?
- A) FNNC ✔
- B) FNANCE
- C) FNNCE
- D) NNC
Why: Remove I, A, E from FINANCE, leaving FNNC.
Remove all vowels from SECRETARY. Result?
- A) SCRETARY
- B) SCRTRYE
- C) CRTRY
- D) SCRTRY ✔
Why: Remove E, E, A from SECRETARY (Y is not a vowel here), leaving SCRTRY.
From 3, 8, 5, 12, 7, 10 cross out the even numbers and add the rest. Result?
- A) 12
- B) 17
- C) 15 ✔
- D) 45
Why: Cross out the even numbers (8, 12, 10). The rest are 3 + 5 + 7 = 15.
From 4, 9, 6, 11, 2, 13 cross out the odd numbers and add the rest. Result?
- A) 14
- B) 12 ✔
- C) 45
- D) 9
Why: Cross out the odd numbers (9, 11, 13). The rest are 4 + 6 + 2 = 12.
From 2, 5, 3, 8, 4 cross out the odd numbers and multiply the rest. Result?
- A) 64 ✔
- B) 22
- C) 61
- D) 66
Why: Cross out the odd numbers (5, 3). The rest are 2 × 8 × 4 = 64.
From 15, 6, 9, 20, 3 cross out the even numbers and add the rest. Result?
- A) 53
- B) 24
- C) 29
- D) 27 ✔
Why: Cross out the even numbers (6, 20). The rest are 15 + 9 + 3 = 27.
24 items cost Rs 35 each. What is the total cost?
- A) Rs 850
- B) Rs 875
- C) Rs 840 ✔
- D) Rs 805
Why: Total = 24 × Rs 35 = Rs 840.
15 items cost Rs 120 each. What is the total cost?
- A) Rs 1920
- B) Rs 1800 ✔
- C) Rs 1680
- D) Rs 1810
Why: Total = 15 × Rs 120 = Rs 1,800.
8 items cost Rs 275 each. What is the total cost?
- A) Rs 2200 ✔
- B) Rs 1925
- C) Rs 2210
- D) Rs 2475
Why: Total = 8 × Rs 275 = Rs 2,200.
45 out of 180 applicants passed. What percentage passed?
- A) 20%
- B) 50%
- C) 30%
- D) 25% ✔
Why: 45 ÷ 180 × 100 = 25%.
12 out of 48 applicants passed. What percentage passed?
- A) 50%
- B) 30%
- C) 25% ✔
- D) 20%
Why: 12 ÷ 48 × 100 = 25%.
35 out of 140 applicants passed. What percentage passed?
- A) 30%
- B) 25% ✔
- C) 20%
- D) 50%
Why: 35 ÷ 140 × 100 = 25%.
What is the average of 12, 18, 24, 30?
- A) 21 ✔
- B) 19
- C) 84
- D) 23
Why: (12 + 18 + 24 + 30) ÷ 4 = 84 ÷ 4 = 21.
What is the average of 45, 55, 65?
- A) 53
- B) 165
- C) 57
- D) 55 ✔
Why: (45 + 55 + 65) ÷ 3 = 165 ÷ 3 = 55.
What is the average of 8, 16, 24, 32, 40?
- A) 120
- B) 26
- C) 24 ✔
- D) 22
Why: (8 + 16 + 24 + 32 + 40) ÷ 5 = 120 ÷ 5 = 24.