Question

Which numbers are irrational? Select all that apply. A. √25 B. √28 C. √48 D. √169

Answer 1

An IRRATIONAL number is a number that can't be written as a simple fraction!

What is a simple fraction? a fraction having whole numbers for the numerator and denominator. To add on that i think it also means that it can be simplified.

So we can't have a mixed number or a fraction that can't be simplified.

A. The square root of 25=5.  Can we turn five into a fraction? We sure can! It's also whole, which is a good sign too.

B. The square root of 28=5.29 We can't turn B into a simplified fraction. it will be a mixed number with  6 93/100.  ✅

C. The square root of 48=6.93 We also can't turn C into a simplified fraction. It will be a mixed number as well, looking like 5 29/100. ✅

D. The square root of 169=13.  This is promising, it's a whole number!  

ANSWER: B AND C

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