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Watch :3 01:00
The sum of all two digit numbers each of which leaves remainder 3 when divided by...| Doubtify NTSE
10 views • 5 months ago Doubtify NTSE
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The value of (10⁴ + 324) (22⁴ + 324) (34⁴ + 324) (46⁴ + 324) (58⁴ + 324) / (4⁴ +...| Doubtify NTSE
13 views • 1 month ago Doubtify NTSE
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History of Microprocessor
6 views • 1 month ago Doubtify BTECH CSE
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If acosθ + bsinθ = 3 and asinθ - bcosθ = 4, then a² + b² has the value : (1) 25 (2)..| Doubtify JEE
110 views • 1 year ago Doubtify JEE Main
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The solution of differential equation dy/dx = cos(x - y):...| Doubtify JEE
35 views • 6 months ago Doubtify JEE Main
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The equation a(x - b)(x - c) / (a - b)(a - c) + b(x - c)(x - a)/(b - c)(b -...| Doubtify JEE Main
657 views • 4 days ago Doubtify JEE Main
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If x, y, z are positive real numbers and a, b, c are rational numbers, then the...| Doubtify NTSE
20 views • 4 months ago Doubtify NTSE
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₹ 1 and ₹ 5 coins are available (as many required). Find the smallest payment which..| Doubtify NTSE
9 views • 4 months ago Doubtify NTSE
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The identity √a . √b = √ab is not true only when:...| Doubtify NTSE
1 view • 3 months ago Doubtify NTSE
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Family y = Ax + A³ of curves will correspond to a differential equation of order :...| Doubtify JEE
39 views • 6 months ago Doubtify JEE Main
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An observer in a boat finds that the angle of elevation of a tower standing on the...| Doubtify JEE
99 views • 9 months ago Doubtify JEE Main
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The square of an odd integer must be of the form:...| Doubtify NTSE
522 views • 4 months ago Doubtify NTSE
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If secα, tanα are roots of ax² + bx + c = 0, then:...| Doubtify JEE Main
27 views • 2 weeks ago Doubtify JEE Main
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If α, β are roots of ax² + bx + c = 0, then the equation ax² - bx(x - 1) + c...| Doubtify JEE Main
44 views • 2 weeks ago Doubtify JEE Main
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If tanα + cotα = a, then the value of tan⁴α + cot⁴α is equal to : (1) a⁴ + 4a² + 2...| Doubtify JEE
53 views • 1 year ago Doubtify JEE Main
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Number of zeroes in the product of 5 × 25 × 10 × 40 × 50 × 55 × 65 × 125 × 80 is:...| Doubtify NTSE
17 views • 4 months ago Doubtify NTSE
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A balloon is ascending vertically with an acceleration of 1 m/s². Two stones are...| Doubtify JEE
50 views • 5 months ago Doubtify JEE Main
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The solution of the equation cos²θ + sinθ + 1 = 0 lies in the interval:...| Doubtify JEE Main
49 views • 3 months ago Doubtify JEE Main
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If P.E. of a system is given by relation U = A/x² - B/x, where A and B are positive...| Doubtify JEE
35 views • 1 year ago Doubtify JEE Main
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Let f(x) = √x² + 2x + 1 - √x² - 2x + 1, then value of f(-5/4) + f(3/4) + f(7/4)..| Doubtify JEE Main
29 views • 3 months ago Doubtify JEE Main
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The value of 2(√2 + √6) / 3√(2 + √3) + √(2 + √3) + √(2 - √3) is...| Doubtify NTSE
3 views • 4 months ago Doubtify NTSE
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√d₁ and √d₁ are the impact parameters corresponding to scattering angles 60° and 90°..| Doubtify JEE
94 views • 8 months ago Doubtify JEE Main
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A small ball of density p₀ is released from rest from the surface of a liquid...| Doubtify JEE Main
17 views • 4 months ago Doubtify JEE Main
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A body executing S.H.M. along a straight line has a velocity of 3 m/s when it is at...| Doubtify JEE
73 views • 1 year ago Doubtify JEE Main
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The differential equation ydy/dx + x = c represents:...| Doubtify JEE
20 views • 5 months ago Doubtify JEE Main
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The degree of the differential equation (d³y/dx³)²/³ + 4 - 3d²y/dx² + 5d³y/dx³ = 0 ...| Doubtify JEE
53 views • 6 months ago Doubtify JEE Main
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If 3 is the least prime factor of number a and 7 is the least prime factor of b...| Doubtify NTSE
66 views • 4 months ago Doubtify NTSE
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Two vertical poles of height 20m and 80m stand apart on a horizontal plane. The...| Doubtify JEE
119 views • 9 months ago Doubtify JEE Main
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For the equation |x²| + |x| - 6 = 0, the roots are:...| Doubtify JEE Main
47 views • 1 month ago Doubtify JEE Main
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The differential equation ydy + xdx = dx represents:...| Doubtify JEE
25 views • 6 months ago Doubtify JEE Main
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The degree of the differential equation [1 + (dy/dx)²]³/² = d²y/dx² is :...| Doubtify JEE
89 views • 7 months ago Doubtify JEE Main
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If (x₁ – x₂)² + (y₁ – y₂)² = a², (x₂ – x₃)² + (y₂ – y₃)² = b², (x₃ – x₁)² +...| Doubtify JEE Main
12 views • 4 months ago Doubtify JEE Main
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If sum of the digits of any integer in between 100 and 1000 is subtracted from that..| Doubtify NTSE
50 views • 4 months ago Doubtify NTSE
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A hollow spherical ball is filled up with sand. Sand comes out through a hole at...| Doubtify JEE
40 views • 1 year ago Doubtify JEE Main
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The differential equation of all circles passing through the origin and having...| Doubtify JEE
51 views • 6 months ago Doubtify JEE Main
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A large cylindrical tank has a hole of area A at its bottom and water is poured into..| Doubtify JEE
47 views • 9 months ago Doubtify JEE Main