If the cost of 5 dolls or 6 balls is Rs. 15, then find the cost of 10 dolls and 18 balls.

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Aayush Asked Jan 16

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If A is the set of the divisors of the number 15, B is set of prime numbers smaller than 10 and C is the set of even numbers smaller than 9 , then $(A \cup C) \cap B$ is the set

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If 6.3 g of NaHCO3 are added to 15.0 g of CH3COOH solution, the residue is found to weight 18.0 g. What is the mass of CO2 released in this reaction?

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Rs. 559 is divided into a, b and c in such a way that $2 \times$ part of $a=3 \times$ part of $b=4 \times$ part of c, then find the part of c.

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Find the volume, the total surface area and the lateral surface area of a cuboid which is 15 m long, 12 m wide and 4.5 m high.

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The ratio of the ages of Sachin and Amit is 7: 4 and the sum of their ages is 33 years, then find the ratio of their ages before 6 years.

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Trick : If any number be divided by 5 Then that number multiplied by 2 and the product be divided by 10 then decimal point should be placed one digit later beside the right side of the product.

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In a mixture, the ratio of milk and water is 8: 7. If 11 litres of water is mixed, then the ratio becomes 8: 9. Find the amount of milk in the initial mixture.

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If vectors a, b and c are mutually perpendicular vectors such that |a|=|b|=10,|c|=1, then the length of vector 2a + 2b + 40c is

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$\tan 10^{\circ} \tan 15^{\circ} \tan 75^{\circ} \tan 80^{\circ}=$

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If $g$ is the inverse of a function $f$ and $f^{\prime}(x)=\frac{1}{1+x^5}$, then $g^{\prime}(x)$ equal to:

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If the median of x/5, x, x/4, x/2 and x/3, where x>0, is 8 then the value of x is equal to

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एक व्यक्ति किसी निश्चित राशि को 5 % की वार्षिक दर से साधारण ब्याज पर उधार देता है तथा 15 वर्षो में संयोजित ब्याज की राशि उधार दी गई राशि से 250 कम है। उधार दी गई राशि ( रु. में ) कितनी थी?

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Let A={1,2,3,4,5,6} and * be an operation A defined by $a{ }^* b=r$, where r is the least non-negative remainder when the product a b is divided by k. Operation * is binary operation if k=

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The two circles $x^2+y^2-2 x+6 y+6=0$ and $x^2+y^2-5 x+6 y+15=0$

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If $\alpha=3 \sin ^{-1}\left(\frac{6}{11}\right)$ and $\beta=3 \cos ^{-1}\left(\frac{4}{9}\right)$, where the inverse trigonometric functions take only the principal values, then the correct option(s) is(are)

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If ${ }^{15} C_{3 r}={ }^{15} C_{r+3}$, then the value of $r$ is

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Parwez (V.P.) has some cocks and goats. If the total numbers of heads and feet are 76 and 212 respectively, then find the number of cocks he has.

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In an examination, 52% students failed in English and 42% failed in Maths. If 17% students failed in both the subjects, then find the percentage of those students who passed in both the subjects.

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सिद्ध करें कि $\sin ^{2} 5^{\circ}+\sin ^{2} 85^{\circ}+\sin ^{2} 10^{\circ}+\sin ^{2} 80^{\circ}=2$

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If a function is defined as $f(x)=\sqrt{\log _{h(x)} g(x)}$, where $g(x)=|\sin x|+\sin x, h(x)=\sin x+\cos x, 0 \leq x \leq \pi$. Then find the doman of $f(x)$.

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If $g(x)=1+\sqrt{x}$ and $f(g(x))=3+2 \sqrt{x}+x$ then find range of $f(x)$.

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5 being subtracted from a number and then the remainder being divided by 4, the result becomes 3. Find the number.

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If the cost of 5 dolls or 6 balls is Rs. 15, then find the cost of 10 dolls and 18 balls.

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