Class 10 Maths Chapter 1: Real Numbers Assertion-reason questions with answers
2 assertion-reason questions on Real Numbers, each with its answer and the reason, written from the NCERT chapter. Open a question's solution to check your working; then take the free test to find your next chapter. Each question gives an Assertion (A) and a Reason (R); choose how they stand to each other.
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Answer: (a) Both A and R are true, and R is the correct explanation of A.
A number ending in 0 is divisible by 10 and needs both 2 and 5 among its primes. 25n = 52n and, by uniqueness, has no 2. Both true; R explains A.
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Answer: (b) Both A and R are true, but R is not the correct explanation of A.
35 = 5 × 7 and 64 = 26 share no prime, so the HCF is 1: A is true. R is true, but A follows from the factorisations having no common prime, not from R.