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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