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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 23901. |
X^=2^x+1 |
| Answer» | |
| 23902. |
Sn denote the sum of the first n terms of an a.p prove that S12=3(S8-S4) |
| Answer» So easy......S12 = n/2 ( 2a + (n - 1)d )S12 = 12/2 ( 2a + (12 - 1)d )S12 = 6 (2a + 11d)S12 = 12a + 66dSimilarly , we find value of S8 and S4S8 = 8a + 28dS4 = 4a + 6d3(S8 - S4)3( 8a + 28d - 4a - 6d)3( 4a + 22d)12a + 66d12a + 66d = S12S12 = 3(S8 - S4)Hence , proved.??? | |
| 23903. |
25 + 40 / 3 |
| Answer» 38.3 or 115/3 | |
| 23904. |
25 |
| Answer» Bauki | |
| 23905. |
Explain why 7*11*13+13 is a composite number? |
| Answer» 7 × 11 × 13 + 13Take 13 common there we get\xa0= 13(7 x 11 +1 )= 13(77 + 1 )= 13(78)It is the product of two numbers and both numbers are more than 1. So, it is a composite number. | |
| 23906. |
Find the discriminent of the quadratic equation 2x square _4x+3 |
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| 23907. |
Formula of a4 +a4 |
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| 23908. |
Koi trick h Jo trego ki identity achey se aa jae |
| Answer» Try kiya par clear nahi h | |
| 23909. |
lateral surface area of cone |
| Answer» πrl | |
| 23910. |
Difference between infinity,not defined and undefined |
| Answer» Infinity is the term we apply to a value which is greater than any finite value we can specify.Undefined means that the value can not be derived using standard rules and that it has not be defined as a special case with a special value; typically this occurs because a standard operation can not be meaningfully applied. | |
| 23911. |
To proove angle bisector theoram |
| Answer» | |
| 23912. |
How to prove Pythagoras theorem |
| Answer» | |
| 23913. |
8root3 Cosec square30degree sin60degree cos60degree cos square30 degree solution |
| Answer» | |
| 23914. |
3xy+5yz-7zxfrom5xy-2yz-2zx+10xyz |
| Answer» | |
| 23915. |
All ncert formula class 10th |
| Answer» Check formulae in notes :\xa0https://mycbseguide.com/cbse-revision-notes.html | |
| 23916. |
If A,B,&C are interioer angles of triangle ABC theN show that since [B+C÷2]=cos A |
| Answer» \xa0A, B, C, are interior angles of a\xa0{tex}\\Delta {/tex}{tex}\\because A + B + C = 180 ^ { 0 }{/tex}{tex}\\Rightarrow B + C = 180 ^ { 0 } - A \\Rightarrow \\frac { B + C } { 2 } = 90 ^ { 0 } - \\frac { A } { 2 }{/tex}{tex}\\Rightarrow \\sin \\frac { \\mathrm { B } + \\mathrm { C } } { 2 } = \\sin \\left( 90 ^ { \\circ } - \\frac { \\mathrm { A } } { 2 } \\right) \\left[ \\because \\sin \\left( 90 ^ { 0 } - \\theta \\right) = \\cos \\theta \\right]{/tex}{tex}\\Rightarrow \\sin \\frac { \\mathrm { B } + \\mathrm { C } } { 2 } = \\cos \\frac { \\mathrm { A } } { 2 } \\text { proved }{/tex}LHS = RHS | |
| 23917. |
Write the empirical relationship between the three measures of central tendency |
| Answer» | |
| 23918. |
X² -X+3 |
| Answer» Try eq. b×b - 4ac | |
| 23919. |
Derive csa,tsa and volume of frustum of cone. |
| Answer» | |
| 23920. |
(x)²+[x²÷(x+1)²]=3Solve for the value of x |
| Answer» | |
| 23921. |
Cos70/sin20+cos55 cosec35/tan5tan25tan45tan65tan85 |
| Answer» Answer is 2. | |
| 23922. |
0.65×15 |
| Answer» 9.75 may be | |
| 23923. |
What is integers |
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Answer» An integer is a whole number (not a fractional number) that can be positive, negative or zero. Examples of integers are: -5, 1, 5, 8, 97etc. Integers are the group of positive and negative numbers |
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| 23924. |
Any idea when our cbse exam would start? |
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Answer» 8 march May be 1st week of march.. |
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| 23925. |
The sum of 4th and 8th term of is 24 and the sum of 6 th and 10 th term of is 44 .Find AP |
| Answer» -13,-8,-3,2,7 | |
| 23926. |
From which book other than ncert do you study mathematics.? |
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Answer» R d shrma sbse hard boooook h kase bna lete ho??? Rd sharma |
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| 23927. |
Ek suggestion chahiye sb ?? |
| Answer» Ky | |
| 23928. |
CSA OF hollow HEMISPHERE |
| Answer» Curved surface area of hemisphere =\xa0{tex}2\\pi {r^2}{/tex}As the Hemisphere is the half part of a sphere, therefore, the curved surface area is also half that of the sphere. | |
| 23929. |
If one zero of polynomial 3xsquare-8x+2k+1is seven time find the value of k |
| Answer» Let\xa0{tex}\\alpha{/tex}\xa0and\xa0{tex}\\beta{/tex}\xa0be the zeroes of the polynomial,\xa0{tex}3x^2-8x+2k+1{/tex}Given,\xa0{tex}\\beta = 7 \\alpha{/tex}{tex}\\therefore \\quad \\alpha + 7 \\alpha = 8 \\alpha = - \\left( - \\frac { 8 } { 3 } \\right)=\\frac{8}{3}{/tex}So,\xa0{tex}\\alpha = \\frac { 1 } { 3 }{/tex}and\xa0{tex}\\alpha \\times 7 \\alpha = \\frac { 2 k + 1 } { 3 }{/tex}{tex}\\Rightarrow{/tex}\xa0{tex}7 \\alpha ^ { 2 } = \\frac { 2 k + 1 } { 3 }{/tex}{tex}\\Rightarrow{/tex}\xa0{tex}7 \\left( \\frac { 1 } { 3 } \\right) ^ { 2 } = \\frac { 2 k + 1 } { 3 }{/tex}{tex}\\Rightarrow{/tex}\xa0{tex}7 \\times \\frac { 1 } { 9 } = \\frac { 2 k + 1 } { 3 }{/tex}{tex}\\Rightarrow{/tex}\xa0{tex}\\frac { 7 } { 3 } - 1 = 2 k \\quad \\Rightarrow 2 k = \\frac { 4 } { 3 }{/tex}{tex}\\therefore k=\\frac{2}{3}{/tex} | |
| 23930. |
Circle chapter ka important theorwm |
| Answer» | |
| 23931. |
Find the area of a circle whose circumference is 22 cm. |
| Answer» Let r be the radius of the circle. It is given that the circumference of the circle is 22 cm.Now, Circumference = 22 cm{tex}\\Rightarrow2 \\pi r = 22{/tex}{tex}\\Rightarrow 2 \\times \\frac { 22 } { 7 } \\times r = 22{/tex}{tex}\\Rightarrow r = \\frac { 7 } { 2 } \\mathrm { cm }{/tex}Area of the circle =\xa0{tex}\\pi r ^ { 2 } = \\frac { 22 } { 7 } \\times \\frac { 7 } { 2 } \\times \\frac { 7 } { 2 }{/tex}cm2\xa0= 38.5 cm2 | |
| 23932. |
Which book did I read for board exam ncert,r.s agarwal or r.d sharma |
| Answer» Ncert and rs agrawall is good for board.. | |
| 23933. |
Can two numbers have 18 as their hcf and 380 as their lcm give reason |
| Answer» We know that HCF of two numbers is a divisor of their LCM. Here, 18 is not a divisor of 380.But 380 = 18×21+2Here 2 is remainder so 380 is not divisible by 18.So, 18 and 380 cannot be respectively HCF and LCM of two numbers. | |
| 23934. |
Find the value of k so that 8k+,6k-2and 2k+7 will form AP |
| Answer» if 8k=a 6k-2 =b 2k+7=c . wkt in an ap 2b=a+c2(6k-2)=2k+7+8k12k-4= 10k+72k=11k=5.5 | |
| 23935. |
If a,b,c,d,e and f are in AP,then e-c is equal to |
| Answer» According to the question, we have\xa01st term = a and common difference = 3{tex}\\therefore{/tex}\xa0b = a + 3, c = a + 2(3) = a + 6d = a + 3(3) = a + 9,e = a + 4(3) = a + 12Now, e - c = (a + 12) - (a + 6) = 6 | |
| 23936. |
Solve for x :=:2(2x+3/x-3) -25(x-3/2x+3) = 0Answer fast plese |
| Answer» | |
| 23937. |
in each of the following find value of k 1- (7,-2),(5,1),(3,k) |
| Answer» (7, –2), (5, 1), (3, k)Area of the triangle{tex}= \\frac{1}{2}{/tex}[7(1 – k) + 5(k – (–2)) + 3(–2 – 1)]{tex}= \\frac{1}{2}{/tex}[7 – 7k + 5k + 10\xa0– 9]{tex}= \\frac{1}{2}{/tex}[8 – 2k] = 4– kIf the points are collinear, then area of the triangle = 0{tex}\\Rightarrow{/tex} 4 – k = 0{tex}\\Rightarrow{/tex} k = 4 | |
| 23938. |
Is NCERT BOOKOR R S AGGARWAL BEST FOR MATHS CBSE BOARD EXAM |
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Answer» Both are best for solving maximum questions in exam Both Both Please study rd sharma, it is best supportive book with challenging questions... |
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| 23939. |
Which book is best for cbse board maths exam ...? |
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Answer» Rd or rs but first refer ncert Rs aggarwal |
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| 23940. |
The value of is |
| Answer» | |
| 23941. |
For some integer m, every even integer is of the form. |
| Answer» 3m or 3m+1 | |
| 23942. |
For some integer m every |
| Answer» | |
| 23943. |
How to find the area of segment? |
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Answer» Pie^2A/360 - 1/2 sin^2A By using formula |
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| 23944. |
If sum of zeroes of polynomial is 100 then find quadratic polynomial |
| Answer» | |
| 23945. |
Prove that 5 is a irrational number. |
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Answer» Let us assume √5 as rational number √5 =a/b where a and b are Co primesSquaring both sides5 =a2/b25b2 =a2 5 divides a2 5 divides a Let a = 5c 5= 25c2/b25 divides b2 5divides b Therefore a nb have common factor as 5But this this lead to to contradiction because a nb have no common factor other than 1 Therefore our assumption is wrong √5 is irrational See u any 10 th class book its a simple yrr... |
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| 23946. |
Write factors of 172 |
| Answer» 172=2x2x43x1 | |
| 23947. |
Find the value of p for which the equation px²-5x+p=0 has equal root |
| Answer» 25-4p root 2 | |
| 23948. |
Find A if sin(A+36°)=cosA, where (A+36°) is an acute angle |
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Answer» A is acute angle therefore A must beA+36° = 90°→ A = 90 - 36→ A = 54° A= 27° |
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| 23949. |
How many straight line of two point |
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Answer» Only one Infinitely many |
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| 23950. |
If we do divide zero by zero So what is the answer |
| Answer» In ordinary arithmetic, the expression has no meaning, as there is no number which, multiplied by 0, gives a (assuming a≠0), and so division by zero is undefined. Since any number multiplied by zero is zero, the expression 0/0 also has no defined value, when it is the form of a limit, it is an indeterminate form. | |