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#### Online Quiz (WorksheetABCD)

Questions Per Quiz = 2 4 6 8 10

### Grade 5 - Mathematics1.24 Beginning Radicals

Square Root
In mÖa, m is the index or order, Ö is the radical or square root sign and a is the radicand.
a*a = a2 and (-a)*(-a) = a2. Here 'a' is called the square root of a2. Thus for a &-a are two square roots of a2. We denote square root with the symbol ' Ö '.

Example : What is the value of Ö25 ?
Solution : 25 = 5*5.
The square root of 25 is 5.
 Number First root 1 1Ö1 = 1 2 1Ö2 = 2 3 1Ö3 = 3 4 1Ö4 = 4 5 1Ö5 = 5 6 1Ö6 = 6 10 1Ö10 = 10 200 1Ö200 = 200

 Number Second Root Or Square Root 1 2Ö1 Ö1 =Ö1x1 = 1 4 2Ö4 Ö4 =Ö2x2 = 2 9 2Ö9 Ö9 = Ö3x3 = 3 16 2Ö16 Ö16 = Ö4x4 = 4 25 2Ö25 Ö25 = Ö5x5 = 5 36 2Ö36 Ö36 = Ö6x6 = 6 49 2Ö49 Ö49 =Ö7x7 = 7 64 2Ö64 Ö64 = Ö8x8 = 8 81 2Ö81 Ö81 = Ö9x9 = 9 100 2Ö100 Ö100 = Ö10x10 = 10

 Number Third Root 1 3Ö1 = 1 8 3Ö8 = 2 27 3Ö27 = 3 64 3Ö64 = 4 125 3Ö125 = 5

Directions: Answer the following questions. Also write at least five more examples of your own for each root (first, second, and third root).
 Q 1: square root of 16: Ö16Answer: Q 2: square root of 4: Ö4Answer: Q 3: square root of 81: Ö81Answer: Q 4: square root of 36: Ö36Answer: Q 5: square root of 25: Ö25Answer: Q 6: first root of 9: 1Ö9Answer: Q 7: fifth root of 1: 5Ö1Answer: Q 8: third root of 1: 3Ö1Answer: Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!

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