Square Root and Cube Root | Aptitude Questions and Answers | Aptitude Free Online-Tests | LucentBlackBoard

01.

How many two-digit numbers satisfy this property.: The last digit (unit's digit) of the square of the two-digit number is 8 ?

A.	1	B.	2
C.	3	D.	None of these

Answer and Explanation

Answer: None of these

Explanation:
A number ending in 8 can never be a perfect square.

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02.

If 5 = 2.236, then the value of 5/2 - 10/5 + 125 is equal to:

A.	5.59	B.	7.826
C.	8.944	D.	10.062

Answer and Explanation

Answer: 7.826

Explanation:

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03.

A group of students decided to collect as many paise from each member of group as is the number of members. If the total collection amounts to Rs. 59.29, the number of the member is the group is:

A.	57	B.	67
C.	77	D.	87

Answer and Explanation

Answer: 77

Explanation:
Money collected = (59.29 x 100) paise = 5929 paise.
Number of members = 5929 = 77.

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04.

If 35 + 125 = 17.88, then what will be the value of 80 + 65 ?

A.	13.41	B.	20.46
C.	21.66	D.	22.35

Answer and Explanation

Answer: 22.35

Explanation:
35 + 125 = 17.88
35 + 25 x 5 = 17.88
35 + 55 = 17.88
85 = 17.88
5 = 2.235
80 + 65 = 16 x 5 + 65
= 45 + 65
= 105 = (10 x 2.235) = 22.35

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05.

The square of how many two digit number have 8 in unit’s place?

A.	2	B.	6
C.	8	D.	None of these

Answer and Explanation

Answer: None of these

Explanation:
No number ending with 8 can be a perfect square.

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06.

A farmer decides to plant 32191 mango trees in equal number of rows and columns. After arranging some trees were left. Find the number of trees left.