If m is the square of a natural number n, then n is (a) the square of m (b) greater than m (c) equal to m (d) √m
The correct answer is (d) √m Explanation Given that m is the square of a natural number n Hence n2 = m... View Article
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3√1000 is equal to (a) 10 (b) 100 (c) 1 (d) none of these
The correct answer is (a) 10 Explanation = 3√1000 = 3√(10 × 10 × 10) = 3√(103) = 10
Which of the following numbers is not a perfect cube? (a) 216 (b) 567 (c) 125 (d) 343
The correct answer is (b) 567 Explanation 216 = 6 × 6 × 6 567 = 9 × 9 ×... View Article
A perfect square can never have the following digit in its ones place. (a) 1 (b) 8 (c) 0 (d) 6
The correct answer is (b) 8 Explanation From the properties of square we know that a number with 2, 3, 7... View Article
Which among 432, 672, 522, 592 would end with digit 1? (a) 432 (b) 672 (c) 522 (d) 592
The correct answer is (d) 592 Explanation From the properties of square we know that if a number ends with... View Article
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The next two numbers in the number pattern 1, 4, 9, 16, 25 … are (a)35, 48 (b) 36, 49 (c) 36, 48 (d) 35,49
The correct answer is (b) 36, 49 Explanation The numbers given in the question are perfect square numbers. 12 = 1... View Article
The hypotenuse of a right triangle with its legs of lengths 3x × 4x is (a) 5x (b) 7x (c) 16x (d) 25x
The correct answer is (a) 5x Explanation From the concpet of Pythagoras theorem, we know that = a = √(b2 + c2)... View Article
Which of the following numbers is a perfect cube? (a) 243 (b) 216 (c) 392 (d) 8640
The correct answer is (b) 216 Explanation A perfect cube can always be expressed as the product of triplets of... View Article
The sum of first n odd natural numbers is (a) 2n + 1 (b) n2 (c) n2 – 1 (d) n2 + 1
The correct answer is (b) n2 Explanation The sum of first n odd natural numbers are given by 1,3,5,7,9…… (2n... View Article
The sum of successive odd numbers 1, 3, 5, 7, 9, 11, 13 and 15 is (a) 81 (b) 64 (c) 49 (d) 36
The correct answer is (b) 64 Explanation = 1 + 3 + 5 + 7 + 9 + 11 +... View Article
If one member of a Pythagorean triplet is 2m, then the other two members are (a) m, m2 + 1 (b) m2 + 1, m2 – 1 (c) m2, m2 – 1 (d) m2, m + 1
The correct answer is (b) m2 + 1, m2 – 1 Explanation We know that general form of Pythagorean triplet is (2m,... View Article
Which letter best represents the location of √25 on a number line? (a) A (b) B (c) C (d) D
The correct answer is (c) C Explanation √25 = 5 × 5 = 52 = 25
A square board has an area of 144 square units. How long is each side of the board? (a) 11 units (b) 12 units (c) 13 units (d) 14 units
The correct answer is (b) 12 units Explanation We know that area of square = Side × Side side2= 144 side=√144... View Article
The one’s digit of the cube of 23 is (a) 6 (b) 7 (c) 3 (d) 9
The correct answer is (b) 7 Explanation The one’s digit of cube 23 23 × 23 × 23 = 12,167... View Article
Which of the following cannot be a perfect square? (a) 841 (b) 529 (c) 198 (d) All of the above
The correct answer is (c) 198 Explanation A number with 2, 3, 7 or 8 at the unit’s place should... View Article
How many natural numbers lie between 52 and 62? (a) 9 (b) 10 (c) 11 (d) 12
The correct answer is (b) 10 Explanation The natural numbers lie between 52 and 62 i.e. 25 and 36 are, 26, 27,... View Article
