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The square root of 25 is 5.

# Irrational Numbers

This Math quiz is called 'Irrational Numbers' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.

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An irrational number is a number that cannot be fully written down into a simple whole number or a fraction. Rather it is written in decimal form but it has an infinite number of digits that extend to the right of the decimal point.

One well known irrational number is pi.

1.
√13
3.5691
3.5698
3.6055
3.6132
The square root of 13 is 3.6055513. Cutting off with the fourth digit to the right of the decimal point we are left with 3.6055. Answer (c) is the correct answer
2.
√123
10.9868
11.0905
11.0975
11.1543
The square root of 123 is 11.0905365. Cutting off with the fourth digit to the right of the decimal point we are left with 11.0905. Answer (b) is the correct answer
3.
√55
7.0987
7.3659
7.4161
7.5243
The square root of 55 is 7.4161985. Cutting off with the fourth digit to the right of the decimal point we are left with 7.4161. Answer (c) is the correct answer
4.
√17
3.9879
4.1231
4.0578
4.1369
The square root of 17 is 4.1231056. Cutting off with the fourth digit to the right of the decimal point we are left with 4.1231. Answer (b) is the correct answer
5.
√29
5.3851
5.3794
5.3785
5.3697
The square root of 29 is 5.3851648. Cutting off with the fourth digit to the right of the decimal point we are left with 5.3851. Answer (a) is the correct answer
6.
√11
3.3212
3.5000
3.3166
3.3498
The square root of 11 is 3.3166248. Cutting off with the fourth digit to the right of the decimal point we are left with 3.3166. Answer (c) is the correct answer
7.
√33
5.7283
5.7297
5.7364
5.7445
The square root of 33 is 5.7445626. Cutting off with the fourth digit to the right of the decimal point we are left with 5.7445. Answer (d) is the correct answer
8.
√47
6.7496
6.7543
6.7579
6.8556
The square root of 47 is 6.8556546. Cutting off with the fourth digit to the right of the decimal point we are left with 6.8556. Answer (d) is the correct answer
9.
√3
1.7320
1.7445
1.7493
1.7501
The square root of 3 is 1.7320508. Cutting off with the fourth digit to the right of the decimal point we are left with 1.7320. Answer (a) is the correct answer
10.
√21
4.5815
4.5825
4.5835
4.5845
The square root of 21 is 4.5825757. Cutting off with the fourth digit to the right of the decimal point we are left with 4.5825. Answer (b) is the correct answer
Author:  Christine G. Broome