Multiple choice

Let x be the least number which when divided by 15, 18, 20 and 27, the remainder in each case is 10. What is the value of (x)?

  1. 550

  2. 280

  3. 1090

  4. 720
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If x gives remainder 10 when divided by 15, 18, 20, 27, then x - 10 is divisible by all these numbers. LCM of 15, 18, 20, 27 = 540. So x - 10 = 540k. For least number, k = 1, giving x = 550. Option A matches.

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