Number system and simplification
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- In the exam pattern: Tier-1 (screening test), Numeric Ability: 20 questions, 60 marks (CBSE notice, 13 Nov 2025).
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Practice this topic
Take a full mock →Q1 · Number system and simplification · EASY
If the six-digit number 1234x5 is divisible by 9, what is the value of the digit x?
Q2 · Number system and simplification · EASY
What is the LCM of 12, 18 and 24?
Q3 · Number system and simplification · MEDIUM
Simplify: 25% of 400 - 1/5 of 100 + 10
Q4 · Number system and simplification · EASY
What is the unit digit of the number 6^25?
Q5 · Number system and simplification · MEDIUM
A number is divisible by 11 if the difference between the sum of digits in the odd positions and the sum of digits in the even positions (from right to left) is a multiple of 11. Which of the following numbers is divisible by 11?