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Given That N Is Odd The Number Of Ways In Which Three Numbers In Ap

1) (n+1)2/4 2)(n-1)2/4 3) (n+1)2/2 4) (n-1)2/2 Answer: (2) (n-1)2/4 Solution: Given, n is an odd number A.P. = 1,2,3,4,....,n As per the... View Article

If The N 1 Numbers A B C D Be All Different And Each Of Them A Prime Number

1) (m + 1) 2n 2) (m + 1) 2n – 1 3) (m + 1) 2n + 1 4) None of these Answer: (2) (m + 1) 2n – 1 Solution: Number of prime numbers =... View Article

If 14cn 15cn 16cn Then N Is Equal To

1) 3 2) 2 3) 1 4) 0 5) 4 Answer: (2)... View Article

If Sn Sum Of Limit R0n1ncr And Tn Sum Of Limit R0nrncr Then Tnsn Is Equal To

1) n/2 2) n/2 - 1 3) n - 1 4) (2n-1)/2 Answer: (1) n/2 Solution: tn = nsn - tn 2tn = nsn tn/sn = n/2... View Article

Let Tn Denote The Number Of Triangles Which Can Be Formed Using The Vertices

1) 5 2) 7 3) 6 4) 4 Answer: (2) 7 Solution: As per the given condition, Tn = nC3 And Tn-1 - Tn = 21 n+1C3 - nC3 = 21... View Article

The Number Of Triangles That Can Be Formed By Using The Vertices Of A Regular Polygon

1) 8 2) 9 3) 10 4) 11 5) 12 Answer: (2) 9 Solution: Number of triangle = n+3C3 = 220 Therefore, (n+3)!/3!n! = 220 (n+1)(n+2)(n+3)=1320... View Article

If A Polygon Of N Sides Has 275 Diagonals Then N Is Equal To

1) 25 2) 35 3) 20 4) 15 Answer: (1) 25 Solution: Number of diagonals = n(n-1)/2 where n is the number of sides. Therefore, n(n-1)/2 = 275... View Article

There Is Set Of M Parallel Lines Intersecting Set Of Another N Parallel Lines In A Plane

1) m-1C2 . n-1C2 2) mC2 . nC2 3) m-1C2. nC2 4) mC2 .n-1C2 Answer: (2) mC2.nC2 Solution: A parallelogram is formed by the set of... View Article

The Number Of Diagonals In An Octagon Will Be

1) 28 2) 20 3) 10 4) 16 Answer: (2) 20 Solution: Octagon has 8 sides Number of diagonals = 8C2 - 8 = (8x7)/2 - 8 = 20... View Article

Out Of 8 Given Points 3 Are Collinear How Many Different Straight Lines Can Be Drawn 8 Points

1) 26 2) 28 3) 27 4) 25 Answer: (1) 26 Solution: Required number of straight lines from those 8 points = 8C2 − 3C2 +1 =26... View Article

Three Straight Lines L1 L2 And L3 Are Parallel And Lie In The Same Plane A Total Of M Points Are Taken

1) m+n+kC3 2) m+n+kC3 - mC3 - nC3 3) m+n+kC3 + mC3 + nC3 4) None of the above Answer: (4) None of the above Solution: Total number of... View Article

There Are 10 Points In A Plane Out Of These 6 Are Collinear If N Is The Number Of Triangles Formed

1) N >190 2) N ≤ 100 3) 100 < N ≤ 140 4) 140 ≤ N ≤ 190 Answer: (2) N ≤ 100 Solution: Out of 10 points 6 are collinear. Therefore,... View Article

Out Of Thirty Points In A Plane Eight Of Them Are Collinear The Number Of Straight Lines Is

1) 296 2) 540 3) 408 4) 348 Answer: (3) 408 Solution: Given, there are 8 collinear points. Hence, by joining these eight points we will... View Article

Is Losing A Hydrogen Oxidation Or Reduction

Losing a hydrogen refers to the oxidation process. To learn in detail about the oxidation and reduction, visit BYJU’S - The Learning App!!... View Article

What Are Common Indicators

Common indicators which are used to indicate the acidic or basic nature are: Litmus phenolphthalein methyl orange bromothymol blue To... View Article

Is Silicone A Polymer

Yes, silicon is a polymer made up of siloxane. To learn in detail about the polymers, visit BYJU’S - The Learning App!!... View Article

Is Nh3 A Hydrogen Bond

NH3 is a hydrogen bond. To learn in detail about the hydrogen bond, visit BYJU’S - The Learning App!!... View Article

Is Radiation A Energy

Yes, radiation is a form of energy. To learn in detail about the types of radiation, visit BYJU’S - The Learning App!!... View Article

Why Does Water Cause Rust

When the water in the form of moisture reacts with oxygen in the air, it undergoes a redox reaction to form a thin layer of deposit on iron known... View Article

Is Rusted Metal Weaker

Yes, rusted metal is weaker. Rusting makes metal brittle and crumbly. To know more about the rusting, visit BYJU’S - The Learning App!!... View Article