A sum fetched a total simple interest of Rs. 4016.25 at a rate of 9% per annum in 5 years. What is the sum?
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Solution
4016.25 =
⇒ P = 8925 Rs.
If a = 0.1039, then the value of
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Solution
= 1 – 2a + 3a
= 1 + a = 1 + 0.1039 = 1.1039
The value of square root of 7 plus 2 square root of 10 end root is
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Solution
[∵ a2 + 2ab + b2 = (a + b)2]
If = 2.24 and = 2.45, then the value of is
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Solution
If = 1.30, then the value of x is :
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Solution
= 10 ⇒ x = 100
Three-fifth of the square of a certain number is 126.15. What is the number?
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Solution
If x = , the value of x is :
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Solution
If then x is equal to
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Solution
⇒ 1 +
⇒
⇒ x =
Which of the following cannot be a digit in the unit place of a perfect square?
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Solution
The digits 2, 3, 7 and 8 cannot be at the unit place of a perfect square number.
If = 1024, then the value of n is
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Solution
= 1024
⇒ = 1024 ⇒ = 45
⇒
⇒ n = 10