Number System
223 CDS Mathematics previous year questions (PYQs) from 21 papers, 2016 to 2026, with answers and worked solutions.
About this chapter
- Difficulty: 36 easy · 152 moderate · 35 hard.
- Most-asked subtopics: HCF and LCM Laws and Fractions (29), Place Value and Digit Problems (29), Remainders by Congruence and Cyclicity (26).
- Updated 20 September 2026.
#1Division, Parity and Consecutive Integers
#2Division, Parity and Consecutive Integers
#3Division, Parity and Consecutive Integers
#4Division, Parity and Consecutive Integers
#5Division, Parity and Consecutive Integers
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- Set · 2 questionsConsider the following for the next two (02) items that follow : Collect all the sequences of five consecutive integers such that their product is equal to one of these integers. Let be the collection of all possible such sequences. Let be the smallest integer and be the largest integer occurring in these sequences.
#6Division, Parity and Consecutive Integers
#7Division, Parity and Consecutive Integers
#8Division, Parity and Consecutive Integers
#9Division, Parity and Consecutive Integers
#10Division, Parity and Consecutive Integers
#11Division, Parity and Consecutive Integers
#12Division, Parity and Consecutive Integers
#13Division, Parity and Consecutive Integers
- Set · 2 questionsFor the next ten (10) items that follow : Each item contains a Question followed by two Statements. Answer each item using the following instructions :
#14Division, Parity and Consecutive Integers
#15Division, Parity and Consecutive Integers
- Set · 1 questionConsider the following for the next ten (10) items that follow : Each item contains a Question followed by two Statements. Answer each item using the following instructions :
#16Division, Parity and Consecutive Integers
#17Division, Parity and Consecutive Integers
#18Division, Parity and Consecutive Integers
#19Place Value and Digit Problems
#20Place Value and Digit Problems
#21Place Value and Digit Problems
#22Place Value and Digit Problems
#23Place Value and Digit Problems
#24Place Value and Digit Problems
#25Place Value and Digit Problems
#26Place Value and Digit Problems
#27Place Value and Digit Problems
#28Place Value and Digit Problems
#29Place Value and Digit Problems
#30Place Value and Digit Problems
#31Place Value and Digit Problems
#32Place Value and Digit Problems
#33Place Value and Digit Problems
#34Place Value and Digit Problems
#35Place Value and Digit Problems
- Set · 1 questionConsider the following for the next ten (10) items that follow :
#36Place Value and Digit Problems
#37Place Value and Digit Problems
#38Place Value and Digit Problems
#39Place Value and Digit Problems
#40Place Value and Digit Problems
#41Place Value and Digit Problems
#42Place Value and Digit Problems
#43Place Value and Digit Problems
#44Place Value and Digit Problems
#45Place Value and Digit Problems
#46Place Value and Digit Problems
#47Place Value and Digit Problems
#48Divisibility Rules and Missing Digits
#49Divisibility Rules and Missing Digits
#50Divisibility Rules and Missing Digits
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