Teaching CTET (Paper 1 & Paper 2) Mock Test Series 2025 Quantitative Aptitude Number System Multiples and Factors

নীচের কোনটি 420 সংখ্যাটির সঠিক মৌলিক গুণনীয়ক?

1

2 × 2 × 7 × 15

2

2 × 2 × 5 × 21

3

2 × 6 × 5 × 7

4

2 × 2 × 3 × 5 × 7

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