MATHEMATICS QUESTIONS AND ANSWERS (2)

By Ibkemmanuel 2021-07-28 EDUCATION 0 Comments

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The nth term of the sequence 35, 47, 59, 611, … is A. n+22n+3 B. n+23n-1 C. 2n+14n+1 D. 2n+13n+2

The third and the fifth terms of a G.P are 12 and 48 respectively. The sum of the first five terms is _____ A. 87 B. 93 C. 98 D. 108

An operation * is defined from a set of real numbers such that a*b=a2-2b+1. The operation * is ___ A. Associative B. Commutative C. Closed D. Distributive

Given that X=-2 3 1 5-2-3 1 0 1 and Y=-5-2 -1 0 1-1 2-2 1 What is 3X-2Y? A. 413 515-8-7-1-4-1 B. 411 513-8-7-1-4 1 C. 4 9-115-8 7-1 4-1 D. 413 515-8-7-1 4 1

-4, -1, 2, 5, ……116 the number of terms in the above A.P is _______ A. 31 B. 36 C. 39 D. 41

2x-5, 3x and 5x-20 are three consecutive terms of a G.P. The common ratio is A. -3 B. 43 C. 34 D. 5

Two operations * and ∆ are defined from a set of real numbers such that a*b=ab and a ∆ b=a2+b2-ab what is 4*9 ∆ 5 ? A. 6 B. 25 C. 31 D. 36

If x+1-23-1= x 4-3-2 ,the value of x is _______ A. 7 B. 5 C. -5 D. 3

The seventh term of an A.P is three times the third team. The first term is equal to _________ A. 0 B. 1 C. d D. –d

Evaluate 100+0.1+0.01+0.001+… A. 100110 B. 10019 C. 10018 D. 10017

Given that *q=2p-3q+pq , where p,q∈R. Find the inverse of 2. A. 12 B. -2 C. 2 D. 32

If -4 3 y-1 x2=-6 1 , the value of x+y A. 2 B. -2 C. 3 D. 4

A man’s starting is ₦25,000 and he gets monthly increment of ₦1,500. If he decides to save his monthly salary, how much would he have saved at the end of second year of service? A. ₦59,500 B. ₦238,000 C. ₦844,500 D. ₦1,014,000

3, 6, 23, 26, … is a G.P. The sum of the first eight terms is A. 156+153 B. 153+152 C. 176+173 D. 173+172

℗	x	y	z	w
x	y	z	w	x
y	z	w	x	y
z	w	x	y	z
w	x	y	z	w

The above table shows an operation ℗ defined from set R=x,y,z,w. The identity element is ________ A. x B. y C. z D. w

Find the inverse of P=25-1-3 A. -3-512 B. 35-1-2 C. -31-52 D. -2-153

Given that Sn=4n2+1, what is Tn? A. Tn=4n+8 B. Tn=4n+5 C. Tn=4+8n D. Tn=8n-5

The sum of the first two terms of a G.P is x, while the sum of the last two terms is y. the common ratio is ? A. yx B. yxn-2 C. yx1n-2 D. yx2n

×	2	3	4	5
2	4	6	1	3
3	6	2	5	1
4	1	5	4	6
5	3	1	6	4

The above multiplication table is done in modulo ______ A. 7 B. 8 C. 9 D. 10

Given that P = -213-1 and I is a 2×2 identity matrix. Find P2+2P-3I A. -3312-1 B. 0-1-3-1 C. -3-3121 D. 013-1

ANSWERS

1. A

2. B

3. C

4. D

5. D

6. B

7. C

8. A

9. A

10. B

11. C

12. D

13. D

14. A

15. D

16. B

17. C

18. C

19. A

20. B

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