Mathematics (Core), 2015, JAMB Exam, Exam, Paper 1 | Objectives

Paper Info

Year :

2015

Title :

Mathematics (Core)

Exam :

JAMB Exam

Paper 1 | Objectives

51 - 60 of 62 Questions

#	Question	Ans
51.	Calculate the value of x and y if (27^x ÷ 81^x+2y = 9 ,x + 4y = 0 A. x = 1, y = 1/2 B. x = 2, y = – 1/2 C. x − 0, y = 1 D. x = 2, y = –1 Show Content Detailed Solution There is an explanation video available below.	B
52.	Simplify √30 × √40 A. 10 √3 B. 5 √3 C. 20 √3 D. 15 √3 Show Content Detailed Solution There is an explanation video available below.	C
53.	If √ (2x + 2) − √x =1 ,find x. A. x = 1 twice B. x = 0 or 1 C. x = 3 or 1 D. x = 2 twice Show Content Detailed Solution There is an explanation video available below.	A
54.	The sum of two numbers is 5; their product is -14. Find the numbers. A. x = 5 or 1 B. x = 7 or 1 C. x = 7 or 0 D. x = 7 or − 2 Show Content Detailed Solution Let x represent the first number; Then, the other is (5 − x) , since their sum is 5 and their product is 14 x(5 − x) = 14 5x − x2 = 14 x2 − 5x − 14 = 0 (x2 − 7x) + (2x − 14) = 0 x(x − 7) + 2(x − 7) = 0 (x − 7)(x + 2) = 0 Either (x − 7) = 0 or (x + 2) = 0 x = 7 or x = − 2 The two numbers are 7 and − 2 There is an explanation video available D
55.	Solve the equation \( 5^{(x − 2)} = (1 ÷ 125)^{(x +3)}\) A. 3/2 B. − 7/4 C. 4/7 D. 7/4 Show Content Detailed Solution There is an explanation video available below.	B
56.	How many sides has a regular polygon whose interior angles are 120°each A. 4 B. 5 C. 6 D. 3 Show Content Detailed Solution There is an explanation video available below.	C
57.	If duty is levied at 25%, find the duty to be added to a bill of N80. A. N100 B. N20 C. N80 D. N150 Show Content Detailed Solution There is an explanation video available below.	B
58.	Simplify 2.04 × 3.7 (Leave your answer in 2 decimal place) A. 7.51 B. 7.71 C. 5.5 D. 7.55 Show Content Detailed Solution There is an explanation video available below.	D
59.	A public car dealer marked up the cost of a car at 30% in an attempt to make 20% gross profit. Due to the value of dollar, he now placed 20% discount on the car. What profit or loss will he make? A. 3% B. 2% C. 4% D. 1% Show Content Detailed Solution There is an explanation video available below.	C
60.	Rationalize 5 ÷ (2 − √3) A. 3(2 + √5) B. 2(3 + √5) C. 5(2 + √3) D. 3 √2 + 1 Show Content Detailed Solution There is an explanation video available below.	C

51.	Calculate the value of x and y if (27^x ÷ 81^x+2y = 9 ,x + 4y = 0 A. x = 1, y = 1/2 B. x = 2, y = – 1/2 C. x − 0, y = 1 D. x = 2, y = –1 Show Content Detailed Solution There is an explanation video available below.	B
52.	Simplify √30 × √40 A. 10 √3 B. 5 √3 C. 20 √3 D. 15 √3 Show Content Detailed Solution There is an explanation video available below.	C
53.	If √ (2x + 2) − √x =1 ,find x. A. x = 1 twice B. x = 0 or 1 C. x = 3 or 1 D. x = 2 twice Show Content Detailed Solution There is an explanation video available below.	A
54.	The sum of two numbers is 5; their product is -14. Find the numbers. A. x = 5 or 1 B. x = 7 or 1 C. x = 7 or 0 D. x = 7 or − 2 Show Content Detailed Solution Let x represent the first number; Then, the other is (5 − x) , since their sum is 5 and their product is 14 x(5 − x) = 14 5x − x2 = 14 x2 − 5x − 14 = 0 (x2 − 7x) + (2x − 14) = 0 x(x − 7) + 2(x − 7) = 0 (x − 7)(x + 2) = 0 Either (x − 7) = 0 or (x + 2) = 0 x = 7 or x = − 2 The two numbers are 7 and − 2 There is an explanation video available D
55.	Solve the equation \( 5^{(x − 2)} = (1 ÷ 125)^{(x +3)}\) A. 3/2 B. − 7/4 C. 4/7 D. 7/4 Show Content Detailed Solution There is an explanation video available below.	B

56.	How many sides has a regular polygon whose interior angles are 120°each A. 4 B. 5 C. 6 D. 3 Show Content Detailed Solution There is an explanation video available below.	C
57.	If duty is levied at 25%, find the duty to be added to a bill of N80. A. N100 B. N20 C. N80 D. N150 Show Content Detailed Solution There is an explanation video available below.	B
58.	Simplify 2.04 × 3.7 (Leave your answer in 2 decimal place) A. 7.51 B. 7.71 C. 5.5 D. 7.55 Show Content Detailed Solution There is an explanation video available below.	D
59.	A public car dealer marked up the cost of a car at 30% in an attempt to make 20% gross profit. Due to the value of dollar, he now placed 20% discount on the car. What profit or loss will he make? A. 3% B. 2% C. 4% D. 1% Show Content Detailed Solution There is an explanation video available below.	C
60.	Rationalize 5 ÷ (2 − √3) A. 3(2 + √5) B. 2(3 + √5) C. 5(2 + √3) D. 3 √2 + 1 Show Content Detailed Solution There is an explanation video available below.	C

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