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A Learning Portal from Recruitment India
Find the odd number/letters from the given alternatives.
962
1090
626
Answer with explanation
Answer: Option AExplanation
626-1 = 625 = 252.
962-1 = 961 = 312.
1090-1 = 1089 = 332.
But,
841-1 = 840 (not a perfect square).
Otherwise, 841 is a perfect square of 29, other are not a perfect square.
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Three of the following four are same in a certain way and hence form a group. Find out the one which does not belong to that group.
Glacier
Sea-coast
Mountain
Ridge
Answer with explanation
Answer: Option AExplanation
Glacier is a mass of ice. But others are different.
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Choose the number which is different from others in the group?
142
62
155
144
Answer with explanation
Answer: Option DExplanation
Each of the numbers except 144, is a perfect Sqaure.
The following is a list of perfect squares.
If a variable with an exponent has an even exponent then it is a perfect square. To get the square root, we simply divide the exponent by 2. For example x8 is a perfect square, its square root is x4 . x11 is not a perfect square.
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