alleryStart learning →Which two numbers are reciprocals of each other?
A−2/5 and −5/2
B2/5 and −5/2
C2/5 and 2/5
D1/2 and −2
Answer & Solution
Correct answer: A. −2/5 and −5/2
(−2/5) × (−5/2) = 1, while the other pairs give −1, 4/25 or −1.
Keep practising Rational numbers
Browse all Rational numbers questions for Olympiad (Class 7), or explore more Mathematics topics.
Related questions
Which of 5/9, 4/7, 7/12 and 3/5 is the smallest?Simplify (−18/42) + (12/−28) to lowest terms.By what rational should 7/9 be divided to get −14/27?A number increased by 1/4 of itself becomes 15/2. What is the number?Which positive rational x makes x + 1/x equal to 5/2?Two rationals have sum 5/6 and difference 1/6. What is the larger one?Find 1/(1×2) + 1/(2×3) + 1/(3×4).What number is −(−3/5), the negation of −3/5?