If (4x + 3y + 9) (3x + 7y – 8) is equal to ax² + by² + cxy + dx + ey – f, Find the value of a+b+c/d-e÷f a) -8.43 b) -9.84 c) -3.64 d) -2.67 Sol: (4x + 3y + 9) (3x + 7y – 8) = 21y² + 12x² + 37xy […]
If (4x + 3y + 9) (3x + 7y – 8) is equal to ax² + by² + cxy + dx + ey – f Read More »
If 24√3×3+2√2y3=(2√3x+√2y)(Ax2+Bxy+cy2) then (2A+√6B-C) is equal to? a) 10 b) 14 c) 6 d) 8 Sol:
If 24√3×3+2√2y3=(2√3x+√2y)(Ax2+Bxy+cy2) then (2A+√6B-C) is equal to Read More »
Study the pie chart and answer the follows questions. Break-up (degree-wise) of the number of students in five students in five school (A,B,C,D and E) in a city total number of students =5800 The number of students in school C is what percentage more than the number of students in school B? a) 7.2% b)
Study the pie chart and answer the follows questions Read More »
The figure shows square U & square V inside square QRST. The area of square U is 49 cm². i f the area of square V is 169 cm². find perimeter of shaded part. a) 40 b) 60 c) 53 d) 66 Sol: Side length of square U = 7 Side length of square V
The figure shows square U & square V inside square QRST. The area of square U is 49 cm² Read More »
What is the HCF of 4/5, 5/6, 6/19? a) 1/380 b) 2/570 c) 1/570 d) None of these Sol:
The probability that a man will live 10 more years is ¼ and the probability that his wife will l ive 10 more years is 1/3. The probability that neither of them will be alive in 10 years is? a) 5/12 b) 1/2 c) 7/12 d) 11/12 Sol:
How many natural numbers up to 2001 are divisible by 3,4 but not by 5? a) 768 b) 801 c) 934 d) 1067 Sol: Divisible by 3 till 2001 = 667 Divisible by 4 till 2001 = 500 Divisible by 12 till 2001 = 166 ⇒ Divisible by 3, 4 = 667 + 500 –
How many natural numbers up to 2001 are divisible by 3,4 but not by 5 Read More »
How many pairs of positive integers(of m,n) satisfy the equation m² + 105 = n² a) 2 b) 3 c) 4 d) 5 Sol: m² – n² = 105 (m – n) (n + m) = 105 105 = 3 × 35 ⇒ m = 19, n = 16 105 = 5 × 21 ⇒
How many pairs of positive integers(of m,n) satisfy the equation m² + 105 = n² Read More »
The value of the expression (cos⁶θ + sin⁶θ – 1)(tan²θ + cot²θ + 2) is: (a) 0 (b) -1 (c) -3 (d) 1 Sol:
The value of the expression (cos⁶θ + sin⁶θ – 1)(tan²θ + cot²θ + 2) is Read More »
If a³ + b³ = 110 and a + b = 5, then (a + b)² – 3ab is equal to: a) 52 b) 32 c) 42 d) 22 Sol: a + b = 5 a³ + b³ = 110 ⇒ (a + b) (a² + b² – ab) = 110 a² + b² –
If a³ + b³ = 110 and a + b = 5, then (a + b)² – 3ab is equal to Read More »
