Multiple choice general knowledge math & puzzles

Jo's collection contains US, Indian and British stamps. If the ratio of US to Indian stamps is 5 to 2 and the ratio of Indian to British stamps is 5 to 1, what is the ratio of US to British stamps

  1. 5 : 1

  2. 10 :5

  3. 15 :2

  4. 25 :2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

US:Indian = 5:2 and Indian:British = 5:1. To compare US to British, normalize the Indian count to 10 (LCM of 2 and 5). US:Indian = 25:10 and Indian:British = 10:2. Therefore, the ratio of US to British stamps is 25:2.

Keep practicing — related questions