Q63.The total number of three-digit numbers, divisible by 3, which can be formed using the digits 1, 3, 5, 8, if repetition of digits is allowed, is (1) 21 (2) 20 (3) 22 (4) 18
What This Question Tests
This question requires careful case analysis based on the definitions of the modulus function to simplify the equation into standard quadratic forms and then find the number of real roots.
Concepts Tested
Formulas Used
|x| = x for x >= 0
|x| = -x for x < 0
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📋 Question Details
- Chapter
- Quadratic Equations
- Topic
- Equations involving modulus function
- Year
- 2023
- Shift
- 15 Apr Shift 1
- Q Number
- Q63
- Type
- MCQ
- NCERT Ref
- Class 11 Mathematics Ch 5: Complex Numbers and Quadratic Equations
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